She has a nasty attitude and lacks the ability to coalition build which is vital in any legislative role. She is very obviously anti-Democratic, and has on multiple occasions talked down about regular Democrat voters. Plus she's said some borderline anti-Semitic things, which doesn't help when her district has a statistical significant Jewish population (I'm pretty sure at least)

She's a weak candidate with weak policies and she doesn't have the appeal of an eccentric old man like Bernie nor the youth or conventional (uhmm Eurocentric looks/appeal) like some of the squad.