Have to wonder if a lot of Ass fighting/wrestling with Abbie is just his way of targeting her with aggressive frustration. He can hit her, shake her, pinch her, but call it playing. (Same way P pinches her when playing or when she is visibly annoyed with Ab.) He is just lashing out. Probably what he does with Sandy too why she cowers.
I dated a guy once (also a raging narcissists) who would do that. "Play" fight, hit with objects, pen me down, and claim he was just goofing around. But it was his way of targeting me and being abusive but in a way that made me look irrational or a witch if I didn't just take it. He was just playing after all.
And you know Ass has a lot of frustration. He has a dumb, useless wife who would rather spend money, drink, eat, and be absent... a daughter who he is essentially a single father to... a son who he feels is a rival in both accomplishments and his wifes affection... and no friends, no life outside of what he has built exploiting his daughter, no real qualities or value. He is just looking for things he can focus all the negative on... whether it's random people online or his own family.
Dude has already been outted as "not nice" when the camera isn't on.