Not OP here and I’ll vote for her in the election 100% but the concerns I’ve seen raised most often are:
She was a cop and her history reflects the history of being a cop. Being a prosecutor means that you’re pressuring innocent people into jail time plea deals and using cops to back up your arguments all the time. She’s the epitome of back the blue.
That makes her a great choice against the “Law and Order” fascist felon at least.