What can I say, I'm one that likes Quinn as a character and hope she
doesn't get a sob story background. The in-your-face, completely unrepentant borderline crazy antagonists (like Joe Pesci's character in Goodfellas) I find fun
. It's the pretend to be all nice - but not (ala Norman Bates/Leah) that annoy me
I'll admit, there's something to a "charismatic villain" character. I'm all for the "Magnificent Bastard" trope as TV Tropes puts it. You know, that kind of bad guy who you just love to hate because he's insufferably smug at all the right times.
Thing is, Quinn doesn't come across as anything like that to me. In my mind, I read her as that sort of arrogant antagonist who's not nearly as smart as they think they are. Honestly, she gives off a bit of a Starscream vibe. Like, she doesn't run the sorority, but clearly she'd like to. She'd like the prestige and the "power" it gives her and probably resents Sage for being the much more charismatic "face" of the organization. She's running a few schemes and thinks that being able to get away with those schemes under the nose of the faculty and other students makes her "clever." But while it may take a bit of skill and finesse to pull something like that often, I just get this feeling that the fact that the HoTs are running a brothel out of their house is kind of an open secret about campus. Quinn certainly advertises it enough. Now maybe someone like Maya doesn't know, but she's also a freshman who's been there like a few weeks at most. So given that this is probably something that the more influential/knowledgeable people around the school know about, running this sideline of hers "under the radar" probably doesn't take as much ingenuity as she thinks it does.
Point being that I, too, see her as an "unrepentant villain," just... not a terribly effective one.