Personally, I think that women have been trained to believe that the primary reason that they either can’t get a man or keep a man is their physical beauty since the first person realized that he or she could make a living off of convincing women of that idea.
More often though, when it comes to a man breaking up with a woman, it’s not at all about her appearance. It’s about how she acts and what her ideology is. Most men, especially those men who are “worth anything as men” will leave post-haste as soon as they realize that the female they’re with is not a woman, but a womyn. They leave because socialists, feminists, “wokelings,” and similar sorts make piss-poor mates and should never be allowed into circumstances when and where they might bear children.
Then again, there is some truth to such womyn’s sentiments, just not in the shallow, venal, ephemeral context that they relegate men’s opinions to. Men have, do, and will break up with womyn because they’re ugly. It’s just that it’s the ugliness of their minds and souls, not of their features and forms, that drive good men away.