It's not that. Maybe some voted based on entertainment value but it was an ad hoc alliance of:

People who only ever vote GOP

Pro lifers

People who thought he was somehow being unfairly prosecuted for Jan 6 and having crates of classified documents in his pool house

Podcast listeners (people who are heavily influenced by Joe Rogan, Tim Poole, and the like)

People who are ideologically aligned with Stephen Miller

And, drumroll...

Centrists who believed the GOP talking point that Biden was the sole or primary cause of inflation. To their discredit, the dems seemed to have no interest in refuting it.