People miss the point of this film
This wasn't a misrepresentation of women. It was a representation of a borderline-psychopath who happened to be female.
I've read comments on here that Dan lead Alex on. But if you actually watch the film the opposite happens - Alex lead Dan on. She's the one who talked about being discrete and just having a good time. She gave him every indication at the restaurant/bar that she wanted nothing more than a fling. So Dan went along with it. Then after that one weekend her borderline traits manifest and that's where things go down hill for Dan.
I think people are too quick to slap the misogyny/misrepresentation of women/pro conservative family tag on this film and just dismiss it. But Alex wasn't a stable professional career woman. She had a severe personality disorder. And Dan was guilty of a lapse in judgment.
IMO if the original ending was kept it would have made more sense. Alex committing suicide by slashing her throat would unequivocally let the audience know that she was psychotic. Instead, the ending they did keep has lead to people using the film and the character to further an agenda.
I dont make love. I *beep* ... hard. - Christian Grey