Hoo boy. Against my better judgment, I'll wade into this pool.
If voting for either party gets you the same result, fascists wouldn't be so focused on elections and trying so hard to take the vote away.
Withholding your vote doesn't do anything. When has losing an election pushed either party left?
Voting doesn't prevent you from engaging in other forms of direct action.
Both parties suck. People will needlessly suffer and die no matter who wins. But there are also people who will suffer and die under one party but not the other, and the same can't be said the other way around. Our democracy is fundamentally flawed, but voting is a tool at our disposal, and we're in no position to turn anything down.