According to rabbonim I’ve spoken with, 95% of failed marriages are due to the wife. Many women are spoiled from feminism these days. They expect “equality” and want to wear the pants in the house. And then with the divorce they demand all sorts of things that are halachicly not entitled to under Jewish law, like alimony, child support, custody, and what not.
They frequently falsely play the abused wife tactic. They shed crocodile tears of “emotional” abuse, etc.