No, she isn't bipolar.

It's something that affects a tiny sliver of the population, yet somehow in 80% of cases where women cheat or act poorly, the guy says she's bipolar.

No, she isn't bipolar. She's a cheating whore. She has agency. She chose to cheat.

No, she isn't bipolar. She refused to use any other technique other than screaming and yelling. She has agency. She chose to be a rotten person.