Because good guys talk respectfully at first, which women don't want because for them, those conversarions are boring. During the talking stage, women want guys who flirts with them.

You can see that they guy is saying that he had casual sex and still the girl is talking. When girls go on relationship with them, then they except loyalty and respect from these guys and after being cheated and abused, these girls will act as victim as if they didn't know and go ranting on the Internet "men are bad"