I mean the GOP has been screaming the former for decades so probably the latter IMO.
But that was before Bernie and AOC were prominent. I think the rise of those two gave the "socialism" argument more credence, causing Democrats to lose ground in places like Miami-Dade and the OC.
This is 100% correct- Bernie and AOC have severely damaged the image of the party and Biden considering Karen Bass was also bad. Bernie, AOC, Omar refusing to denounce Maduro as a dictator and not recognizing Juan Guaidó as the leader of Venezuela along with Bernie's Castro comments were just terrible. The riots and the line Biden unfortunately(and clumsily) had to walk hurt too. That and Biden needed to go to Florida more, he should have gone to Miami-Dade in July.