Women leave because they think they’re better than their man and thus deserve a better man than him, whilst men leave because they’ve had enough of the woman’s hysterics and ingratitude.
Most high value men would leave a high value woman who cheated on him, but most high value women would not leave a high value man who cheated on them.
Why? Because she still thinks he’s better than her. Plus you’ve gotta factor in feminine masochism.
A woman will accept far worse treatment from a man she thinks is vastly superior to her than she will from a man she thinks is her inferior or equal. All dignity goes out the window (and bad men exploit that).
Men leave when the woman stops having sex with them, and becomes hysterically disruptive for a protracted length of time.
If nobody leaves anybody even though the man is tired of the woman’s crap or the woman thinks she deserves better than the man, then most likely one or both of them is sacrificing their personal happiness for the sake of children or they’re using each other to keep costs down.