
I think it got something to do on how the male lead was brought up by his parents. Although, it wouldn't excuse his mistakes, it would at least explain it. He was fooled by their schemes and never realized how much it affected his wife but also his son. I don't think he necessarily turned a blind eye to it as we can see that he did care for her but again, he didn't do anything to save her. That is why he's making up for everything but changing his every wrong decisions in his past life. The only question is why did he separate his child and wife?

regardless of how he was raised he clearly knew what he was doing was wrong and as an adult he needed to do something to help. Not even bothering to check on his wife and child for years is absolutely turning a blind eye to it. Even a child would know you shouldn't let someone be bullied and abused like that. If he had paid even a little bit of attention to what was going on he would have seen how bad it was. He just didn't want to or couldn't be bothered to.
As to why the kid got taken away I imagine she was in no condition to care for him and he was probably goaded into giving him to the other woman. I will give him credit that he is not malicious enough to come up with that idea on his own he was probably told to or forced to.

yeah he was just focused on stabilizing his power and didn't care at all about his wife and child. Like he had so many options to help her out or at least make her time less miserable and he literally chose to do nothing. not even when he was stabile and had power. that is what pissed me off the most about him was the absolute lack of any kind of effort to peacefully cohabitate with his wife the mother of his only child.
Like if you are going to make him a cold uncaring man stick with it. Don't try and make me like him after I have seen nothing except cowardice, cruelty and indifference. I'd like his defenders to name one good trait about him. Literally all he has going for him is that hes "sorry" that is his only redeeming trait. Narratively his entire character can be described as cold, aloof and guilt ridden. He literally has no good traits. Almost every scene he has been in he has been cold and indifferent to her. even mildly hostile at times. Occasionally looking at his son and spontaneously building a greenhouse are like the only nice things hes ever done here and this is some real bare minimum effort. He doesn't even have good art to be eye candy. All in all i find him to be a real trash tier ML and would really rather they just divorce amicably and she could move on with someone who isn't a living representation of her slow and cruel death.
My problem with the ML is that he didn't just do one or two things to hurt her. He wasn't somehow misinformed or didn't realize what he was doing. He knew exactly what was going on and turned a blind eye to it for YEARS. And didn't try to come up with ANY way to stop it. the dad straight up told him he was going to drive her over the edge and he just say back and let it happen. He was frankly a coward and a shit head and I find what he did unforgiveable no matter how sorry he is now. In this lifetime he was still a shit head until he got his old memories back. He is not a good person. He is a guilty son of a bitch who is trying to make things right because he knows what he did was so unredeemable. If I was her I could maybe forgive him since he genuinely seems sorry but I would never trust him or like him again after that. I find him incredibly unlikeable and no amount of gifts or apologies will make up for the years of neglect and abuse she suffered because of his negligence.