And also the Neoliberal legislators who created the atmosphere of working class desperation that made a fascist strongman a viable candidate, right? DWS being one of the most prominent of them?

Your boss and landlord love this idea

Yeah, the same moderately sized group that calls for single payer health care, living wages, etc, etc. The people who actually run the party keep them around to keep their left flank just hopeful enough not to defect to the Greens or PSL, and work hard to ensure they are never allowed any actual power to affect anything in the party that might make the donors sad.

but there are a surprising amount of Democrats against RCV.

Why is it surprising? RCV threatens their power just as much as the GOP’s.