I think you also need to reconsider your thinking. It is not *kinda* older brother's fault. Older brother being a bitch does not justify his younger brother's actions. Also, have you not seen the chapter where the younger brother intentionally aggravated the older brother so that their friends from university can see. I agree that older brother needs to work on himself but actually, his younger brother has more issues. He is one manipulative ass.
The issue here is you cannot force to like someone. The parents should have worked on the issue when they were younger but it's too late for that now. There's also no redeeming their relationship because the younger brother (literally) fucked the older brother's life. So with communication/no communication there's no *relationship* to salvage.
they way you wrote it sound like all was wooyeon fault ,he is a victim and it's not his fault for not talking to woojin. it's his choices ,yes wooyeon is rude to woojin and dislike him but why that's consider as his fault for dislike someone? he didn't want to talk ,that's his choices . you can't blame him for that .

ok they seriously need to talk things out and im gonna be honest its also kinda wooyeon fault for not talking things out and he also need to work on his anger issues on his brother and the fact the some people on the com sec is saying they want more smut/rape scene needs a theraphy ik that this is only fiction but still...