Uh, never? As an American I can easily recognize that we live in a 2-party political system in which you have 3 real options:
- Vote for the Democrats
- Vote for the Republicans
- Don't vote / Waste your vote
American politics is a game of tug-of-war. You can spend as much time as you want lamenting that the rope isn't exactly where you want it to be right now. But the fact is that one party is pulling the rope to the left and the other party is pulling it to the right. If you want the rope to move right you better join the people on the right, and if you want the rope to move to the left you better join the people on the left. And more to the point, if for whatever reason you don't want to pull (maybe because it seems futile or maybe because you just don't like the people on your team) then where can you expect it to move other than away from where you want it to be?
There is no politician on Earth who perfectly represents my politics, ideals or philosophy. If I wanted someone who perfectly represented exactly what I want I would get politically active and run for office myself. In lieu of that, what else can I hope for but to vote for the people who happen to be pulling in my direction, or at the very least pulling back against the mob of right-wing fascist criminals.
I don't think Biden is perfect, but he's certainly not evil. What's more, I know exactly what we're up against when it comes to Trump and the Republicans (who at best are spineless impotent political cowards, and at worst are fascist activists who want to strip people of rights, further rob the working class, deny climate change in the name of profit, destroy what little democracy we have, and weaponize the government against political enemies).
I've said this before and I'll say it again for all takers, name any politician who you think would be making more progress on important issues (healthcare, climate, education, transportation, lgbtq rights, women's rights, the economy, etc.) than Biden right now and I'll give you at least 3 reasons why they wouldn't. (Hint: the House, the Senate, the courts, state legislatures, inflation, unstable geopolitics, post-pandemic economic change, etc.) Bernie or Warren could be sitting in the Oval Office today, and we still wouldn't have universal healthcare (because of Congress), we still wouldn't have been able to wipe out student debt (because of the courts), we still would have to deal with wars and terrorism overseas (because of aggression from countries like Russia and Iran), and we still would be feeling the effects of inflation (because of decades of low interest rates coupled with pandemic supply chain fuckery).
So yeah, I'm not gonna stop voting for the better candidate of the two, because what the fuck else would any reasonable person do? Pull the rope towards where you want it to go. It's not hard.