These are two separate things.

Yes, I agree that he should retire and pass the torch to whoever wins an open primary without interference by the DNC.

But that doesn't mean he can't win.

I'd vote for a cat with mange and one eye who lives in an IHOP dumpster over a Nazi sympathizer.

I would certainly prefer nearly anyone reasonable over that cat.

But I'll be damned if I'm going to not vote against the collapse of American democracy, irrespective of how enthused or not I am about who that vote is ultimately for.

Though really, it's the two party system that needs retirement.

I probably agree with ~80% of the US electorate on the issues that are actually most important to me. Which means we should have one party that represents that vast majority with aggressive open ranked choice primaries to see who controls it, with fringe groups like outspoken communists or fascists needing to run severely minority candidates rather than kidnapping half the nation by getting lucky during a fragmented closed primary process with a dozen candidates for only half the nation.

Nazi Germany could have been defeated with ranked choice voting well before WWII.

American democracy must be preserved or the world is fucked, but it should also probably get a bit of an update with the best features developed and vetted in democracies since 1776.