I hate her as being the embodiment of a lot of things I hate in our society : glorifying superficiality, easy money, utter lack of class and thinking that being in a reality TV show is the greatest thing ever.
I feel the same towards other Jersey Shores people, but it's the one I hear about the most, since I don't follow the show and have no interest into places that would discuss it.

This being told, I don't hate her enough to actively do anything about it. F!S may well be the only place where I do so. But I do get why she would grate nerves, her and the mere fact that there's so much talk about people like that.