Yes I've always said that, in the where isabel goes she says she wanted the house, to settle down and he didn't want it... Then as you say the abuse video... Also in the abuse video she says she was forced to drive a car and punched
nothing in lazys personality says she'd put up with that and also why would you want to settle with that.
My opinion and its only an opinion is that she wanted the family life he didn't, they split it was messy because she resented him for not wanting the lifestyle she did, and she's now very bitter that her dad's settled married has a child, genuinely happy and in love, and she hates it, she also resents the fact that he doesn't want his daughter on social media and so she's taken isabel away from him. Had he not minded guaranteed the story would be different and she'd be seeing her other family.
If her dad and his family was trouble how many opptunitys have there been for him to start on social media, the reason he hasnt shows he has nothing to defend himself for and remaining dignified. The theropy could be for many things or is it she's seeing her dad and together they are having help.
It's only my thoughts I'm not saying it's like that