The way that normally reincarnation many was deal with real life people going into novel characters. You have to understand that with those stories, its easier to separate yourself from you (as the person) and you(as the character). If I you were to reincarnate as a villain ease to did crimes, you would think that SHE did it, not you right? However here, it's abundantly clear that him and only him abused, neglected, and in the end, caused the death of his wife. He cannot separate from those actions
If the ml would just kill fl father everything would not have been mess up
I can forgive him but that dosn't mean I have to like him. He didn't make one small fuck up he committed years of neglect and abuse. Just because he's sorry now dosn't mean hes not a piece of shit for doing all that. He didn't even TRY to come up with some alternative to help his struggling wife. There was not even the thought to try and stop her dad's bullshit. And even now he's just putting a bandaid on the wound by buying her shit.
People still shitting on ML when he literally wants to repent for what he did in the past life but y'all support FLs from manga/hwas who, in their past life did horrible things, and want to change themselves and their futures