She was underpowered and reduced dollarstore version of Rogue powerwise for one and had a completely different personality. She was just downright mean and was the embodiment of all the bad writing tropes of female characters of the 90's and early to mid 2000's. Sure Monet could be sarcastic and always had quips that could come off as patronising and/or rude if you don't know her but she was never cruel. She'd never needlessly flaunt her powers in front depowered mutants and rub it people's face that she still has hers like she did to Rictor and the depowered crowd in mutant town, and having experienced grief and the loss of a parent she sure as well would never tell someone they're talking too long to accept their parent death or mentioned that she had a better relationship with their dead father than they ever had like she did with Terry. What really should have brought the two closer and cemented their relationship was Sean death and not them getting cheated on by Jaime.
Monet's superiority complex never felt classist (at least to me) and she never was a raging elitist until x-factor. She never was arrogant, sure she loads of bravado and a dash of self righteousness that came from her being genius and superpowered, teenage self importance and some of it was a front she put up to hide her emotions and insecurities her past with emplate left her. But she was never conceited and borderline eugenicist.
That with the bad writing PAD used where everyone was one dimensional and rude with hints of human emotions here and there except for Jamie and later adult Layla (who got to actually be full rounded characters) just makes her stint on X-factor disliked by a lot of her fans.
Like Monet feeling safe and allowing herself to be vulnerable around Jamie because she trusted him isn't a bad thing, that she has a relationship with someone she can open up with and makes her feel like herself again after her trauma is good actually. But how she was reduced to an accidental clone hook up with Jamie continuing to sleep with her after because he didn't want to face the consequences of his dupes actions and the whole thing dismissed as a one night stand after was terrible and cringe to read.