I agree... Also, it is not that he does not want to be connected. I think inherently he wants it, but just that he finds it difficult to. He was desperate to maintain friendship with malini, because that is who he got close to after Nishanth left. He does not have any friends outside of Malini.
From a family standpoint, while he has a family that loves him and that he loves, I think there is a lot of differences in each of their basic characters and Adi being who he is, does not conform to them, and neither does he offer platitudes or justifications or excuses. He is always standoffish and I think that gussa bhara hua tha, that he tells Imlie about, I dont think even he realised that and I think that was what was keeping him away from everyone. Since Imlie invaded his heart unawares, there is a mellowing of sorts, but only towards her. He recognizes a kindered spirit in her, in terms of her value systems. Uske baad to kuch bhi poochne ki zaroorat nahi hain. I was reading a post on Insta somewhere... going back to his breakdown when Nishanth talks of his last wish. Adi breaks down in Imlie's arms and says "Angrezi Bakaiti nahi chali" Imlie responds with "Koi baat nahi... hum aur hamari bewakoofi hain na... "
Anybody else listening to this would need explanations... the minute he said angrezi bakaiti nahi chali, she understood what he meant... and that he has given up hope. She reassures him. I am there, we will figure out a way together. That language spoken and body, will come when you are in that space.
Also, he is a person who takes things at face value. What you see is what you get. He does not understand the nuances until and unless it is Imlie... and many a times he has missed there also.
100% agree to everything you said, could not have said it better.