Beaniebby's feed

Hi I remember reading a comment awhile back in regards to each character being pretty much morally Gray. Everyone pretty much has a backstory and no one was really a good nor bad person. I tried to go back and find the comments but it's so many. I remember the reason Oscar treated the FL that way was because of her brother killing him for revenge. But I can't remember if he really did like her in the beginning. So did he? I wanna say I did see a comment saying he treated her well in the first years of their marriage. But I'm not sure. And if he did why did he switch up in the later half?