Honestly? Fuck the son. The dad didn't KILL the mother, she was in a car accident after another verbal fight that seemed to happen a lot.
The dad, while he has violent issues, clearly has a conscience that isn't all there but enough of one that he isn't heartless. He wants to surround himself with people who aren't just greedy asshats or trying to pull a quick one under his feet. He grew up poor and he clearly has trust issues. I also wish it wasn't so violent but at the end of the day his attitude makes sense. I think he's a much better chemistry driven character, more than the son we know vaguely and who literally got together with a gay man who gave up actually everything for his father/son relationship to heal only to cuck him over after marriage and pretend he was having a affair to the point he was exiled from the company, disowned, and casually abandoned his supposed love-of-his-life for over a year AS A WAY OF REVENGE AGAINST HIS FATHER.
The dad doesn't deserve it. The MC doesn't deserve it. I DON'T DESERVE IT.
Mr. Kang's Son-in-law