As for fan edits, I think the only prequel that’s unsalvageable is The Phantom Menace. Doesn’t matter how much you edit it, there’s still not a relatable main character in sight unless you dub Jar Jar or something.
TPM is quite okay as it is to be honest. Obviously not good but still watchable. I can easily relate to either Qui-Gon or Obi-Wan. If you somehow cut out Jar Jar, there are very few annoying things left. On the other hand, AOTC is in fact unfixable. There is a clear main character and he is super annoying (much more than Jar Jar in TPM). I cannot see how anyone could even remotely relate to Anakin in AOTC.
Qui Gon is a generic good guy who wants to train Anakin for the sake of the plot. Change Obi Wan’s name and he’s as boring as green potatoes. As for Anakin later on, if you cut out all his excessive whining, he really becomes like this autistic yes man who craves order. It’s clear he has something mentally wrong with him.