If you are progressive you should vote for Biden and play the long game like the Republicans do.
Yes, Biden suuuuucks, and is likely to do fuck all as President other than just “not be Trump” and be relatively competent (or incompetent in a way we are used to as Democrats).
But the reality is, you should vote for Biden because of judges. If Trump gets to appoint another Supreme Court Justice and continue packing his picks into the judiciary, the progressive agenda is done for a generation. You can kiss Medicare for all goodbye for 20 years, regardless of who is President, and regardless of it has popular support.
Operating this way is one of the reasons that Republicans are able to continue to win when they are not in power. A court with Biden appointees will be a lot better than one with Trump appointees, who will essentially have veto power over the entire progressive agenda until they die.
And honestly, Biden has already promised to select a black woman for the Supreme Court. Because of this, his pool of potential candidates that are qualified is pretty small, and almost all of them would be among the most progressive picks in our lifetimes, particularly on criminal justice reform. (Unless he does something really lame like pick Susan Rice).