Many people have moved on from S1 and are watching S2. But everyone can't do that. I have moved on because the last episode I watched was 245. That's where the show ended for me. But many people watched the last episode of S1, where they showed the car blasting. Obviously, it's heart breaking that a love story which always was a 'hamesha' one, got such a sad ending. To top it, in the blast scene, BD was used. The sources (Let's face it! human nature, people do believe in sources) said that Parth had shot for happy ending and the scene with BD was introduced just to continue with the show in S2. Well, now it is obvious that the fans feel cheated because, the show did not respect the viewers who stuck to it despite their countless goof ups and bad episodes, and also because 'hamesha' lost it's value. The one year that people actually lived the love story felt like a mistake. A sad ending to a love story will certainly not go down well with most.
Now regarding bashing Niti (I am a Niti-fan, been following her work before KYY started), let's not forget that her Note that it was not her fault that someone left the show, came out when people were not even discussing 'Na' of the show. People were just crying that the story was ruined. She chose the wrong time and wrong way to put things across. And thanking Karishma seems really bitter to the fans, because lets face it, Nandini's character has been butchered in S2. She is not the same as she was in S1. Now don't say that she is a human too and she will move on from Manik. Okay agreed that the girl has a whole life in front of her to look forward to, but moving on in three months? Seriously? Whatever happened to the characterisation that they can't live away from each other? This is not a fresh story, is what the makers have been saying. So yes Karishma has pissed off many by the way the show is going in S2.
So the thing is that whoever are watching S2, good, their choice. But they should not mock the people who are trending. There may be some who are doing it to just see Parth onscreen. But there are many who want a happy ending. Ofcourse it would not be the same without Richa, even if parth comes back for HEA, but its the HEA which matters. Just the memory that manik was there in the blast, makes the entire one year, the growth of their story meaningless. You cant see old episodes with 'hamesha', without your heart crying that manik actually left and they couldn't survive their 'hamesha'.