But again, that's just your personal bias. Let's just accept as true your (emotion-filled) statement that Biden and the Democrats are evil. It's still beyond dispute that they are less evil than Trump and MAGA Republicans.
So, a non-vote puts the two evil entities on an equal standing, when the proper / right / moral thing to do is to vote for the lesser of two evils on the basis that the greater of two evils would be an horrendous outcome. No?
Arguably, although an argument could also be made that this exerts pressure on the Democrats to change, and the moral thing to do is to exert all possible pressure on Biden (when lacking the financial resources to lobby/bribe him). When more pressure is exerted on haranguing people to change their minds out of principle than it is on the Democrats to improve their policies so as to appeal to them, then I think there's something wrong with your democracy.
I also think if you're in a state like California or, frankly, around 39 others, you may as well not vote because the moral quandary of letting Trump win is as abstract a one as it is for those of us sitting a hemisphere away with no voting rights.