"if it weren't for my medicine and unique skills, no one would love me" said the beautiful girl with the huge rack
putting the joking intention aside, she really does have enough positives to make a lot of people like her (even if only on the surface) so i guess her reason for having this kind of thinking is solely due to her "hobby"? unless we got some kind of backstory with some other wild twist, it still seems to me like it'd have to involve her, uh... desire to control people, as what puts people off from liking the "real" her. Which to be totally fair to her depressed ass, yeah, that's gonna be a hangup for a lot of people, even the ones she can't control (aka the party), but I feel like this is all gonna be resolved with a "but look at all of the good things you've done tho" speech & maybe some suggestions on how to use her obsession to more positive use, like un-corrupting a noble or un-evil-ing the demon king or whatever lol. I just can't imagine any other outcomes, she either gets told "nah that's pretty dope actually" and her angst vanishes, or she just... continues being upset until the former repeats enough times that her angst vanishes, idk