I think part of the problem with the prequels is that three films was just not enough time to properly tell Anakin’s story.
But Lucas started off numbering the films with TESB, with roman numerals.
How could the prequels have consisted of more than three films without ruining the Episode system or confusing people?
I was thinking what if the first film was Episode 0 but that wouldn’t work for two reasons. First being roman numerals don’t have a zero, and second, it would be detrimental to marketing purposes. The second film would be called “Episode 1”, third film “Episode 2” and so on.