Some women are batshit crazy. I have no idea about Bivol's situation. Maybe he's scumbag, maybe he's a bit of an asshole, maybe he was actually quite good to her but she just has it out for him after the divorce. You never know.
I've had women hate me for unjustifiable reasons so I never underestimate women's scorn. I once had a girl who broke up with me because I didn't answer her text back fast enough (no joke, it was like 5 minutes) and then when I accepted the break up, she started to call me and threaten me. Another was a coworker who I barely interacted with, and I found out she was talking shit about me to other coworkers. She just decided she didn't like me for some reason I will never know. Then she moved onto another target and was suddenly cool with me and started to ask me to cover for her at work lol.