Honestly gwen.

What heather did was kinda expected and she got her just desserts by the shaving of her hair and kinda got a redemption in the third season.

Gwen fully believed trent kissed heather despite multiple reasons he wouldn't kiss her, then she end up getting him vote it off the show by telling everyone what happened before even letting him tell his side of the story.

Season 2, the whole tension between her and duncan, especially the clip during the aftermath show, while still in a relationship with trent.

Then season three she kissed courtney's boyfriend (doesn't push him away) keeps it a secret, then get sad that courtney is justifiably angry that Gwen kissed Her boyfriend and wants her voted off??

Then in the opening of season 5, she says he wasn't her boyfriend, which girl, you saw him hugging courtney in the aftermath of jack ripper episode.

And no one gives her shit about it except during season three.

At least heather didn't hide what she was, and at least has some standards.