Isn’t this situation exactly when you should look to third parties? There is a large group of people who are dissatisfied with the policies of Biden and who absolutely do not want another term of Trump.
If you vote for either of them, it sends the message that you condone their presidency. If you abstain from voting then it sends the message that you don’t care about government policy and therefore, policy won’t care for your interests.
If you are a third party voter, aren’t the big parties incentivized to try and win your vote over for themselves?
I’m probably going to vote for Biden, but you have to wonder at what point does this diametric system break down.