Not saying he’s a saint, but isn’t an alternative interpretation that he was young, inexperienced, and had a bad relationship, then grew up, learned some things, and had a better relationship later? Julian Lennon was on Bill Maher’s podcast recently and described a reconciliation between him and his dad right before he died.
Again, not trying to excuse all his bad behavior in his first marriage, but I also don’t think that a failed relationship is enough evidence to judge a whole life by, especially one that was under extraordinary pressure.