
Actually I don't hate him and I'm glad he's trying to be a dad for Yul because Yul seemed to be upset about not having parents like other kids these days.... And if Yul is happy I am too.
But I still think his method is not good at all and he seems sus. Saying things like "who is the dad here haha" when jaehwan said to fall them if something goes wrong... Dude, know your place.

I personally don't hate him, but I don't like him either. I mean he left Yul, and yes he's trying to reconnect with him, but correct me if I'm wrong, but I think in the beginning he said something about how others would perceive him if he had a son that he just left, so that makes another reason for people to not like him. Also, characters like him are usually the antagonist of the arc. So I think that's why people don't like him.

I don't hate what he's doing, its why he's doing it.You don't get your child back just to make the child's mother to feel bad...that's just wrong and his connection with Yul isn't a positive and healthy one he's only thriving by filling Yuls loneliness with stuff he likes...and as i've heard before money can't solve everything.

I personally think that the dad has a mental problem. Whether he's still not over with his marriage issues or thinks that gay relationship is not real or something else. There is definitely some dark hints I believe, and that he's not doing all this with pure intention.
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I read this from another comment, and they said that the dad will kidnap Yul
Why does soo many people hate yuls dad. Yes he messed up by not being in his life before but he’s really trying now and yuls room looked amazing. Your telling me he put all that effort in for nothing. Plus he’s not pushing the uncles away and acting with them in mind. Anyway from a realistic viewpoint it’s a good thing