The attitutde that men are interchangeable accessories like shoes, rather than human beings. The attitude that it's okay to date scumbags you'd never introduce to your parents. The attitude that a guy who's in his 20s and hasn't nailed at least 10 girls is a loser.

Men probably have just as many shitty attitudes, but I don't encounter them directly in my dating life (only indirectly, because most women I know have been with some awful men).