The thing is, they don't even have an excuse to be like this. It's not like they're incapable? Their enemies are long gone. I get how the ML is not in a sound mind to consider that but the FL? Idk i just don't think raising this boy properly would've been the least of their concerns and yet they both think it was. They didn't had to be together. But they should've atleast acted like an adult.
exactly, its not the childs fault that he looks like his dad. I mean FL kid already looks like him you don't want him to be messed up like his dad. Making sure the kid didn't turn out like any of them should have been their priority. But then again that what the plot wants, its just sad whay happens to the kid

I can't really blame their daughter for being like that, since they raised this poor boy with indifference. These grown ass adults shouldn't really been left with children really