Trauma does weird and messed up things to a person's mind. Imagine growing up in a space where you were taught by those around you that being ho** isn't good or it's disgusting and disgraceful. The more he grew up around that... The more he started to deny that he was the same as Sooin and that's how all the abuse towards Sooin started like I said on chapter 26. It's pretty obvious he does have feelings for Sooin, always have cause of all what he does to him wouldn't make sense if he didn't. He just abuses Sooin because he's in denial and because it caused a split between his parents and divorced parents causes trauma. I just wanted to speak my observation and opinion.

Okay I really feel that dumb*** did all those horrible things to Sooin because he's very in the closet and ashamed to even think he might be the same as Sooin so he puts all his denial, shamefulness, etc into abusing Sooin for being the same. I feel deep down he has feelings for Sooin but doesn't show it properly cause he taught himself that it's not okay to be ho** so he kept hurting Sooin for it.