Do you have examples of the dirt that wouldn't have been directed at a man? I paid a lot of attention to this election cycle and I must have missed it.
She's a woman, and they think she is nasty. What does that have to do with her being a woman? Plenty of anti-Trump people have called him a nasty, horrible man. That doesn't make it a sexist statement, as much as the Clinton campaign and supporters have tried to make it so. (And I say this as someone who voted for Clinton.)
Are we pretending trump didn't insult every opponent in his campaign regardless of gender, or are we pretending it's worse because Hillary is a woman? I'm never sure what to pretend politically.