If we keep voting for bad candidates because "the other viable candidate is worse," we will never have a chance to actually make the changes I think we need.
I guess it boils down to whether you agree or disagree that Trump is an unprecedented threat to our country or not, far beyond the typical fearmongering we hear about in every presidential election. If you see him as just a generic bad along with Biden and you don't really care which one wins, then vote for who you want.
I think that a Trump win fundamentally changes our country for the worse, in a way that no past (and likely no future) presidential candidate ever could have, thanks to his complete and open lack of regard for our democratic norms, and to the cultlike devotion of his followers. But if you disagree or don't care, then do what you have to do.
