To start off I will ignore bad dialogue and/or acting. No; for me, after 17 years (!!) Since the last prequel came out, the biggest problem was that it told the wrong story.

It should have been about a young Jedi Master called Obiwan Kenobi and how his renegade, unsanctioned, training of Anakin Skywalker ( a gifted pilot and incredibly strong in The Force, but mentally unstable) lead to the downfall of The Republic.

Despite my issues with TPM, there is the beginning of this idea at the end of the film - but it is never continued into the following films.