The same DNC that blamed the left for Hillary losing and then credited centrism with Biden winning?

Yes. They can continue to blame, but they will continue to lose.

Those are fine goals, but pragmatism involves addressing reality as it is, not how you would like it to be. I doubt you can achieve both removing legitimacy from the system as you see it and forcing the DNC to speak to the left simultaneously since the DNC is a part of the system that’s in place. Unfortunately the DNC appealing to the left needs to be a two way street, make the left more appealing to the DNC than the right. All those Republicans endorsing Harris is the right appealing to the DNC, the left needs to out do that effort to pull the DNC to the left. Rejecting them won’t do that, only the opposite.

This is peak liberalism, lmao. The DNC is pulling right because of their donors, if they think they can win without the left then that is their miscalculation.