People also know both parties are complicit in that, though obviously Republicans are more shameless. & A lot of folks still get swept up in the vibes when Dems do empty performative bullshit, but younger folks more uniformly have had enough of both & are ready to flip the table.
A political party is not a single atomic entity. So when one thinks about a political party as a single atomic entity, one is likely to reach poor conclusions.
Flip the table then. Let's see a third party to the left of the Democrats with double digit national support. I'll support it!