You're too soft. He's an asshole, yes. Maybe he does have a reason to be so closed off and a grump overall. But there's literally no reason to be a rapist and that's what he is. A rapist.
trauma does NOT excuse the harm he has caused, the author loves to write bad characters and then try to redeem them, unsuccessfully may I add. your doing exactly what writer wants you to, just forget about him being an abuser, a rapist and a man that uses his power to cause harm with no consequences because he feels lonely oh no poor jk. that's what the author did in bj Alex and that's what they did here. also even if he suffers from teribble trauma that effected him deeply , Kim Dan didn't do shit to deserve the terrible treatment he has gotten, he is not at fault and even if jk comes begging on his knees, Kim Dan is not obligated in any way to forgive him.
I forgot what I’m supposed to be mad at Jaekyung for. And to be honest I feel a bit bad for him, I remember that he was an asshole or whatever, but no one is an asshole for no reason, he must’ve been hurt when he was younger or something. That still doesn’t excuse whatever it was he did but I still feel bad for him, a little bit, anyway.