Wanted to put my thoughts on it.
So I really loved their bond at the start and it wont be wrong to say if Sid had any true heart to heart connection after Sana it would be Asim. I remember Asim was being bullied right from the premier and I dont really blame anyone for that, he does have a different accent and he looked very over confident for a newbie like him, which is why even Salman could not stand him and may be right so. I didn't like him either looking at the premier. On the other hand Sid did come out as a mature famous celebrity and looked good with all his aura and charm and no wonder got all the limelight with most of the women picking on him that day as partner. So the show started with Sid being my favorite from day 1 and I did respect him , and undoubtedly he has an aura and smile which can be worth drooling for.
Coming to the house, after the initial evictions and some of good supporters of Sid leaving there was a need for connections. Paras had already sided with Rashmi and Devo , and so did Mahira. Asim was always a no-one and the only way he chose to garner attention was small fights which mostly revolved around is accent and body. He was clearly being picked up by everyone and Sid choose to side with him which was really nice of him to do. As Sid has always said so I guess him choosing SId was mostly due to him being able to relate with a newbie in town like him and of course the angry young man image that Asim put in the fights, he saw a bit of himself and did stand by him most of the times. So yes there was a good bond between them and soon Sana joined in too(I wont say much about Aarti for obvious reasons). They shared a quite reciprocal relationship between them, just the difference being Sid took him in more like a childish young man , and Asim took him as a mentor bcoz of all what he has done in the past and experience but more importantly also as a Friend and not like a Sir kind of respect and being a yes yes puppet all the time. However as it takes a few days to build up things in any bond, Asim did remain passive and heard what he said coz off-course Shukla comes with lots of experience with him and Asim thought that he is this way, and we do accept friends with all the flaws so both of them did. Shukla accepted him for all his childish stupid fights and only stood by him in fights sometimes supporting and other times just symbolically standing besides him, so did Asim for his loud speech and less respect when it came to Sid listening to Asim. However here Sana enters and Asim sees him totally respecting and understanding and trusting her, when the whole house could see she cant be trusted. Whenever Asim did bring her into convo Sid just gave a nod mostly, it was clearly visible he did have a bigger soft corner for Sana and treated her at par with him in friendship which was not the case for Asim. Sana did play her role in increasing the insecurities between the two brothers.
I will have to put it whenever you see their conversations in the initial days, Asim did take his points seriously always and tried to understand. On the other side Sid spoke to him always and was clearly with him but whenever it comes to taking a few inputs from him, he only listened and never really trusted or understood him well. I dont know why he has had a bit of trust deficit and lack of respect for Asim, and I guess it comes from Sid thinking he has taken Asim in his protection , though he never put it in words and also he has never seen Asim as a sane person and just sees him as a child who has no sense. Each of this is clearly visible in almost all the tasks , he just said han han and then said tu nai samjhega mera sun and stuff and it continues till the tunnel task and so the outburst. The continuous appreciation only made him believe he is the best when it comes to tasks which I agree he is this season , but again its a group task so even if u have the best strategy u have to hear from all and then put your points, which was lacking on part of Sid. Sid thought he could handle Asim the same way he did with Aarti who despite of all the insults from Sid came back to him bringing news from all ends. Asim did the same and I have hated him in all the bitching sessions with Sid, when Sid just heard most of the times. He did have things in mind which most of the times he put before Asim in indirect words- remember THE TAPE RECORDER mode of shukla- beacuse he dosent want to look like he is bitching or keeping things in head, but all along he did. Asim tried saying things out only to be shushed or shooed away by Sids anger which caused this huge built up.
Remember how Aarti was thrown like a thrash when Sid saw her mingling with his "enemies", failing to understand that she did that because like Asim she felt unheard and shut up by her team head. By the time WKW praises only strengthened Sids belief that he is doing really well , even when he should have been told strictly to be cautious in his and Mahiras fight( I dont support anyone there totally too). The same started happening with Asim too , which kind of showed evidently in tunnel task. The problem here Asim was no Aarti and stood for what he felt was right, rather than being a puppet to Shukla. Are chalo I agree Asim was at fault too and Arhan did good that day, but he had the right to be atleast heard well that day and crosscheck what was being done wrong by his team. But as again Shukla is the task master so he felt he can never be wrong. He didnt understand him again there, chancewas taken by Arhan to add fuel to the fire there again. Even after that Sid only heard him coz he was annoyed and by the time he also realized that Asim has things in head and he is no Arti and cant be just shut up. WKW where Salman praised him made him take hint of that clearly. Remember Asim was behind in that wkw episode and did come to him like a friend always smiling and without big grudges, but again he shooed him away disrespectfully and was not interested in his conversations. But as soon as salman praised he was back to hugs because he realized he must be looking wrong there. All this while I agree Asim did have so many things buried which had to be out and they came out in the form of apples and oranges, making it look only Asim had things in mind and he burst but many fail to see same was with Shukla, and him being one who shows an image of "I dont care" always said things in TAPE RECORDER MODE, never directly coz that would burst the bubble that he does care about all what others say, be it Rashmi or other people around.
Salmans praise which I guess channel wanted to send as an hint to Sid, was taken but as I said , the bond was gone - and especially only from shuklas side as he understood he cannot tame Asim anymore. He could not come into terms that a young lad like Asim can be so understanding and dimagdar for him to be taken seriously. He has only seen him as a person who is benefiting from his fandom and riling against him coz he was praised, failing to realize Asim too has saved him on many occasions with his physical fights and kind of covered up all the things that could have gone against him- be it with women or his coming to close to people, like he did in the roti fights with rashmi. He did go to many Housemates behind Sids back and never told him I did this for you- like requesting to make rotis and offering help rather that only putting orders.Each and every member of the house had given up before sid- first bcoz of his aggression and second WKW biasness. Debo did put the right arms a bit late, but soon Asim Sid took over.
However the sad part is Asim in the fight to prove Sid wrong took over many of his things to show Sid the mirror,is where I think he went wrong. He has always felt fight is the easiest way to get cameras attention(remember his conversation with Sid about vishal? Wo ungli nai karega to mei karunga). He tried telling Sid that he comes so close to face(same in swayamvar task where he was nudging) which Sid didnt understand, so to make him know what he does he did it the next day(Sid saying ekdum muh k pass aa jata hai, man kar raha tha lafa bajau, itna nai kar sakte). Asim did go very overboard with all of this as he saw Shukla retaliating every time and he knew he would push.All the bad words that he used were totally wrong and not to be done on National TV,looked like Salmans praise did go over his head, but I agree you need guts to stand before a man like shukla when everyone in the house gave up before him. You could clearly see Shukla wasent expecting this from him and was quite for a moment.
However the so called mature man of the house must have realized that his weakness is being used, and should have avoided Asim, I do agree he did try but Asim ran behind him everytime and Shukla instead of ignoring him (targetting him :p) gave him what he wanted and also highlighted his hypocrisy on many levels like
1. Him saying that day too - agar hum jani dushman bhi ban jaye to bhi ye baat un tak nahi jani chaiye, I am trusting you and stuff. ( As I have said many assume Shukla is being real, but he also has things in his mind against people, but he does not say them or even if he does he puts them indirectly with his TAPE RECORDER MODE on, to maintain an image of I dont care). After the fight he was hell scared that Asim might open some of his cards(which Asim didnt, and if he did tell a few things he only did with his own team-Himanshi and Shefali). Sid got so desperate that he started telling Paras about what Asim said, when he clearly didnt need to as he is anyways strong and people would come back to him or new people would beg(Paras and Mahira) to get into his team without Sid showing his loyalty towards them . But Sid with that fear of being sidelined went and started Asim ne iske pare me aisa bola, waisa bola(Park area when Asim as sitting too), when Asim in retaliation said a few things about paras that shukla said too which went unheard as Shukla wanted.
2. Him not liking his friends talking to others and he just brushed off Aarti even without telling her reasons properly. I agree Asim shouldn't have been so insecure of Debo and Sid as he was only playing along, but again there was misunderstanding between both ( Sid thought: Asim is insecure of Sid grabing all the limelight( He was but only because he was doing it with Debo or Sana(biggest Flip), and Asim: He can do that but when I do he dosent like it). This could be solved with Sid pyar se making Asim understand that it is a game and he doesn't like Debo and explaining to him he is still with him , but all he did in his anger was bol dia? Ho gaya? Karunga etc and not understanding again, only confirming Asims insecurity.
3. Taking his friends for granted and not trusting them, and when his friends did the same showing it as a sin. I am not a fan of all the shuklis , they have been always under Shuklas pressure(thanks wkw) and agreed to what he said but one thing I would point out is that they have been loyal to them(not implying they dont bitch about him among themselves or to others, but always saved him from being in bad light). They have always tried giving him constructive criticism(Shefali, Asim) but as I said he has always thought they are with him anyways so never tried to explain or hear them truly. Be it Shefali or Himanshi or Asim.( I am as confused about Arti as much as she is).They always tried to prevent him(anger, bully, rashmi pin points etc). It is clear how they could use those things against him as now when shukla is with Mahira and Paras are doing. ( Mahira and Paras clearly using him as a pawn, using his anger, laughing at him, using his weakness for sana in their favour, using vishal and going to the extent of lying about shuklas friends to him). Shuklis never made fun of or said we will use it against him or gret rid of him, which is being done by Paras now. Unfortunately Shukla thinks he is not in their influence but he is totally(evident in Captaincy task). Perfect example of how your strengths can be used as weaknesses in the wrong company.
4. Listening and understanding. Never done that with Arti, nor Asim. Started doing that with Shefali after the leader tag.He rarely did it with his friends- be it about sana( clearly with shukla bcoz she knows she was bashed at WKW after she left him, she has a soft corner for paras, also evident from what she told to Khesari-shukla strong hai unke mudde me khade ho and stuff. Paras didnt give her any bhav over mahira, which was done by shukla over his friends- the only reason she is with him. She cant take SKs bashing at all, and she gets highly demotivated by it which happened after she went to paras ). But,Doing that(listening) clearly with the Palti group seen in captaincy task. His friends still showed the sanity to choose him when he was bitching about them to other people( Shuklis mostly do it among themselves or atleast dont show the other group what he told and stuff) for captaincy, he said with akad mei nai banunga, and thought abhi ye log"chatenge" aur bolenge ban ja, but surprisingly they chose other two contenders and said theek hai (he thinks they were with him coz he is strong, right but having done that they gave equally too to Sid be it loyality or stopping him where needed.Paras rightly said it, hum uske paas nai gaye, wo humare pass aaya) nai bano, but was shocked when they didnt and went and told his mahanta to his Shuklis in making(paras gang) ki mei nahi ban raha. But they said kyu nahi banega, ban ja(to favour themselves and not Sid like Shukli 1 wanted), and the over akalmand insaan like a puppet went there.
At the end I dont like shukla anymore, does not mean I side with Asim..he has been equally wrong in using weakness about his friend against him and not needed to pull it so long. But he still seems sane sometimes and accepts his flaws( Ladko me hota hai, not making issue about shukla choking him much, not jataoing ehsaan(he did only when shukla was), standing for right( Rashmi part for rashmi and also for sid(wo bura dikhega), not siding with shefali when he spoke about lips, telling himanshi she is wrong about make up part,asking shefali mei kaha galat tha, going to sid to sort things, not pushing back sana each time she pushed(had it been mahira and shukla i dont need to say what would have happened)..and so many......
There is so much more, but ist would be too long
All I can say is I hope shukla mends his ways and so does Asim, and even if they play in different groups they play it like a game and the deserving one wins