He didn't even want byul in the first place dojin basically forced him to have byul
ikr do people rather have him with byul while he’s having a mental breakdown, it’s worse to be with the kid and appear emotionless. and from the start the author made it very clear that hyesung acts immature because he lacked people who cared for him when he was young.
They just forget what dojin did to hyesung cus he's hot like man literally r@ped hyesung and forced jim to have the baby then they hate hyesung for running away
To the people saying bad thing ab hyesung and how he doesn’t care ab byul you clearly aren’t thinking about the amount of trauma he went through and how overwhelmed he must be after hearing that.