If she was truly such an awful person, wouldn't she have made a clean sweep of nominations and be up for eviction right now? The other HMs have had a much greater opportunity to study her than we have. I can't say that I love her, but I think she's entertaining in her loopy way, where some of the others are just dull and seem to be following Sarah's mother's advice to keep their heads down and stay below the radar for a few weeks.
I do think it is rather unbecoming to bash her for calling herself polyamorous purely on the basis of disliking her and misunderstanding what the word means.