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.
This is a really contrived hypothesis and probably wishful thinking considering the current state of the world, but hear me out:
You know how the Overton window gets shifted? Rightwing voters grew a lot in the US and Democrats had to get more to the right to appeal to them and not keep losing.
We just need to force the reverse. If Democrats keep winning elections Republicans will be forced to put out a candidate that’s more palatable to leftists sooner or later. Someone who isn’t a literal movie villain. At that point, Democrats will lose their only selling point (being the alternative to Satan himself), and they will have to actually push for leftist policies to get people to vote.
This can only happen if Democrats win a lot of times in a row though. Even one Republican win will ensure them that they can keep pushing fascists and have a chance to win.
The thing I generally disagree with is the idea that Democrats would move leftward, and not just further into Liberalism. Even Social Democracies in the Nordic countries are seeing a decrease in the welfare state, just like Reagan did with FDR-era policies.