Option 4: I am not fine with what Trump is going to do, but I am also not fine with what Harris is going to do. And, since Harris said that she wouldn't do anything different than Biden, that could amount to "I am not fine with what Biden has been doing the last four years".

Was that less bad than what Trump has done in one year? Yes. But Trump in his first term was less bad than this, and recency bias means that what we didn't like about Biden was more prominent in our minds.

But my option 4 looks just like your option 2 in terms of how people voted. I'm just saying that the motive may have been different.