I hope this represents what I’ve started saying needs to happen everywhere. If the Dems have failed to field a candidate at all, or if the Dem is unopposed in the primary, or if all the Dems are more-less equally good, or if the Dem nominee has a snowball’s chance of being elected, then liberals and moderates need to register as Republicans if necessary. Vote for the least repulsive, least racist, least rightist Republican who knows who won the 2020 election.
Even if the Democratic primary is worth voting in, consider how bad it is for the country when rightist, astroturf, Twitter trolls keep getting fed with primary election victories. Preventing that could well be more important than getting to express one’s exacting preference in the Democratic primary.