Let's see, an honest question posted about voting Green nets you a current score of -8. Yeah I'd say you're justified in feeling attacked.
I'm Canadian and don't know much about the US Greens, but I can tell you that any party that would run Joe Biden twice is not a party I'd ever vote for, especially now given his miserable response to literal genocide.
The Democrats can do this because they think they have your vote by default. It's not like you're going to vote Republican, right?
But here's the thing: you don't get progress that way. The Democrats are never going to run someone who doesn't support Israel unequivocally or isn't fixated on helping capitalism destroy the planet so long as they think they can count on you voting "not Republican" every time. Yes, the Republicans are worse, but contrary to appearances, they're on the same team, presenting the illusion of choice so long as that choice favours as little actual change for the rich as possible.
So yeah, fuck the Democrats, and definitely fuck Joe Biden and any other "let the world burn" candidate. Vote green if you want, or stay home if you like. Just make it clear to Democrats (and their apologists in this thread) that your vote isn't a given. That's how you drag them kicking and screaming toward progress.