Woman is uninterested in or annoyed by man who fancies her.... but he changes her mind and she falls in love! This probably does very occasionally happen IRL, but I'm sure this trope is responsible for an awful lot of crap women have to put up with ('She friendzoned me!' 'Women are weird like that, you just have to be persistent'), which at its worst leads to:
Woman has made it clear she hates man, but he starts kissing her without her permission and of course, she surrenders to him because that dislike was just that crazy, mixed-up woman way of saying how attractive she found him!
This sort of crap contributes to a culture of blokes thinking it's OK not to get a woman's consent - I mean, if they're taught that women who say they hate a guy are actually saying they want him to fuck her, of course you can't be assaulting a woman who likes you or gives any indication of liking you, it's practically a green light!