I don't like Biden either, but anyone with half a brain knows there are two choices in the 2020 election. If we had a sane voting system, voting third party might be worth it, but as it stands, no one but you knows your favorite candidate exists and unless you want to become their campaign manager that will still be true in November. Even if you did, and even if you convinced two thirds of the people who would otherwise have voted for Biden to vote for your chosen candidate instead, Trump would still win because half the country voted for him and your guy only got a third. If you vote third party you might as well stay home.
Not voting isn't going to stop the genocide in Gaza. The US will continue to funnel them arms no matter which candidate wins this November. Trump practically campaigns on how much he hates the Jews and he's publicly told Israel to "finish up their war". He'll also make life a living hell for anyone who isn't a straight cisgender male back here at home.
A vote for a candidate is not an endorsement of them or their policies, it's a statement that you like their policies more than the other guy's, and "sticking it to liberals" and "refusing to support genocide" (that's not what voting for Biden is doing, by the way -- a vote for either candidate is a vote for genocide and a vote for neither is an endorsement of both) is not more important than keeping the furthest right politician America has ever seen out of office.
How incredibly privileged do you have to be to see an entire national election as what will happen in the Middle East and ignore Trump's campaign promises to wipe transgender Americans off the map, and further, to not realize that the same thing will happen in the Middle East regardless of which candidate wins?
I hate Biden as much as every other leftist here. But I'll still vote for him because Trump is worse. If there's a single bone in your body that cares about the lives of your trans friends you will too.
Project 2025 playing out in 2025 is worse than it playing out in 2029.
For one thing, more of us undesirables might be able to actually escape from the US.
For another thing, we might be able to delay it further or prevent it entirely. For one thing, so long as the Republican party is not the entire government, there's a chance we'll actually see the justice procedures play out. With every week, more information becomes public about the illegal or immoral dealings that got us here, which becomes moot once the US goes full autocracy. And in the meantime pressure on the GOP is causing it to collapse from within. But again that's not going to matter once they control everything.
So there are good reasons to postpone the fall of democracy in the US, even when it's a corrupt, meager handful of democratic features.
Then there's the matter that while I am high on the purge list, You and everyone else here are also on that list (with some very few friends-of-General-Keitel exceptions) and will eventually be packed on the cattle cars. If you're lucky the allies will reach Berlin (proverbially in this case) but they're not going to be in a forgiving mood when they get here.
Nothing becomes moot if we do slide into autocracy, this isn't a video game. And you're still assuming it doesn't play out in the red states anyways. The blue states aren't going to just roll over, and the red states are going to do it no matter what the federal government says. This entire way of looking at politics is like a game with clearly defined rules and limits. This is real life, there are no limits and the rules only matter so long as they can be enforced, and that goes both ways.