First off, I'm also a woman, a feminist, and a tarantino fan.
I will admit I find some movies very offensive, but these tend to be movies that use rape for entertainment purposes (The Hills Have Eyes for example...disgusting), and some comedies which seem both offensive to me gender and my brain. (Usually prat boy type movies).
However, Quentin has NEVER fit into this category. If anything is mildly sexist, it's because almost everything is mildly sexist anyway, theres nothing particularly offensive about Tarantino's. Tarantino writes the movies that he rights, they are for the most part quite violent with crude language. I find this to be the reason why I do not see Quentin as a sexist. He writes his men and women essentially the same. Men can be violent and crude, women can be violent and crude.
He is never going to write a highly cerebral emotional tale, he's always going to write Quentin style, and in that Quentin universe, men and women are both bloodthirsty and capable of violence, and in these portrayals they are equal..