I just read an article om MPP and the L.A. Our revolution's withdrawal. Along the way I read an article about the Green Party's nomination process. Somehow the article on the Greens failed to see that a National party with less than 100,000 members, where there are states with less than 100 members, has already failed. (note that the Green presidential candidate received 405,704 votes, in a uniquely difficult election. (in 2016 they received 1,457,218) clearly there is more support for the Green party in principal than there is in practice. Why? Hint: it is not because their nomination process is "undemocratic".
Suggestion 1: Make up your mind about the Democrats, and go in it to win.
Strategically the Republicans are not our enemy, the Democrats are. Everyone knows the long list of betrayals and evils. I won't bother to try to list them all. Suffice it to say that we are making fools of ourselves dithering over whether or not we are "spoilers", we are replacements, and the sooner we admit it and act appropriately the better. In 2016 Bernie beat the kill crazy Lovecraftian horror the longer the primaries went along, he beat her or came very close in primaries with confirmable ballots, he had overwhelming support with independents - and "independent" is a misnomer - they are not "swing voters", they are voters who are fatally disenchanted with their natural party , but will either come back in line or stay home, and they are about 2 - 1 "liberal", as 2020 demonstrated. Had late primary (when people knew him) Bernie run as an independent he would have won going away. Trump would have still won the old Confederacy and the deep red mountain flyspects, and Hillary would probably have won New York and a little of New England, but she would have finished a humiliating third.
But more to the point we obviously cannot support any Republican (well, there might be an exception or two, if you dig deeply into city elections and such) but being unclear about the Democrats is counterproductive. During the building stage support worthy Democrats - but to eventually recruit them, not to give fealty. And unequivocally oppose those Democrats that are unacceptable. And do not be afraid of losing, expose the corporatists and the rabid Russiagate demagogues and the warmongers and the spy lovers. Be consistent.
Don't Fall For Identity Politics, Cancel Culture, Or Other False Fads.
I look at Saagar Enjeti. I would define him (not as he would) as the right wing of the Berniecrat Party in waiting. This risks a conundrum, I would welcome him into my party, though I consider his position on population control suicidal. How is that different from a pro-life Democrat? I think there is an answer, but that is me, not everyone. It has to do with a willingness to accept the humanity of others. To illustrate it does not apply to someone who firebombs an abortion clinic, or who calls in a phony police report in the hopes that the police will kill someone who wrote a negative review of your comic book or who supports blacklisting of people who did not vote for Biden.
There are stories - and it doesn't matter if they are true or not - that a majority of Hispanic Americans are "opposed to illegal immigration". There are valid opinions on how people who have chosen the difficult path to citizenship or have entered the country for a good reason; it is not racist to demand that people play by the rules or at least try. And whatever you do, don't parrot silly studies that illegal immigrants do not depress wages because the sky is green and water is dry. Some people are poison, do not be fooled just because they have a lot of social media exposure.
Summation.
There are 5 tools to political success: Morality, Intelligence, Popular Support, Money, and Force. The more of these tools you have the better, I'd say you need at least two and should have at least three. So, be morally consistent regardless of the short term consequences, and know what you're talking about. (and admit when you don't) These two will get you popular support and transform money into the tool that is used only by someone who is desperate and unacceptable, and force (even defined so that such things as domestic spying are included) will lead to a quick repudiation. Drifting and whining won't work.