No, I don't really think that can be entirely blamed on Bernie. Bernie at the very least popularized a lot of left wing talking points and made Americans critical of the status quo. People were passionate about Bernie, and because of his campaigns and how he was demonized and colluded against in the primaries. Since his campaigns, it is much easier to talk about the flaws of our capitalist democracy now to liberals who are somewhat open to the idea.

Being a cheerleader for Biden is obviously bad, though. He could have handled shit way better. No more half measures etc