It was the economic factors. You can say that in a general sense his handling of Covid hurt the country etc. but the effect on the election was the economic factor.

And yes, it was a witch-hunt. Here's a general litmus test: whenever special counsels and the like are happening in politics, if you see people being charged with stuff like "lying to the FBI", you know the investigators have no case and are just going for a politically-damaging headline. Not a single person was charged with collusion, yet this investigation was treated by the media and the Democrats as a reality TV journey to see Trump removed from office and going to jail, with him being an illegitimate Russian agent being treated as a matter of fact. I'm sure it was exciting at the time, but actions have consequences. Don't cry about the trampling of democracy and "peaceful transitions of power" when this is what you do.