I don't think they were smart enough to "fix an election" if by that you mean somehow manipulating the vote totals with fake votes. These are not particularly bright people who were known for getting things done. I do think they used COVID as a pretext to change the election laws in a way that changed the outcome. Imagine if Trump and the Republicans had changed the elections is the weeks just before the election in such a way that statistical changed the outcome. There would have been justified outcries that the election was unfair. Trump would have won the 2020 election by the same margin that he won in 2024.
Disagree. You're underestimating an opponent. This is why Trump embraced Musk. Musk's SpaceX computer nerds prevented this same chicanery in 2024. You mention "fake" votes. SWITCHING votes from 1 candidate to the other are Not "Fake" votes. And a SWITCHED Vote is actually a 2 vote switch in the vote count.