I do tend to think that's basically correct. I think that the people who react most negatively to the character (when she's portrayed warts and all) are those who've behaved (or at least felt) similarly themselves or perhaps experienced others who've behaved that way to them.
I've felt this way since previews way back when. One time I sat in front of two people who just couldn't stop laughing at and commenting on Fosca, and I had to restrain myself from saying to them, "Why do you feel so threatened by this character's behavior?"
