I have often thought about the prequels, and how I initially felt when watching them. The truth is, I enjoyed myself while going to the theater to see them opening night. There was hype, and by Episode 3, the hype was more like "Boy I hope this one is FINALLY the one that get's it right". Each time I was moderately satisfied, as were many, but I think it's the reflection of the film that is where our frustration really developed.
I just want to say that there ARE plenty of good things about the prequels. Liam Neesan for example. In fact, nearly all of Episode 1, up until Jar Jar hit the screen, was amazingly good. But there were small problems. Too many of them. Obi Wan in the OT makes it seem like he met this guy named Anakin, who was a great pilot, and it just kind of sets up a scene where Obi Wan should have met Anakin on his own, and taken it upon himself to train him - but Episode 1 changed all of that, and let to a huge inconsistency. The OT also makes you feel like Yoda trained Obi-Wan in a similar manner that Luke gets trained, with a lot of 1 on 1 training - and the prequels somewhat contradict this and turn Yoda into a Kindergarten teacher. And Padme being "fine" with Anakin slaughtering an entire village, including women and children. And one of the worst things, was that you do not, at all, get the idea that Anakin and Obi Wan were "Good friends". The very first time we see Anakin and Obi Wan together as "Master and Student" in episode 2, they are arguing. In fact Anakin complains about Obi Wan virtually non-stop throughout the entirety of 1 and 2.
And there were big ones. Medicloriens was a big one. Anakins sudden and immediate decision to serve the emperor and kill children was another.
I think if Disney were to re-do this entire prequel trilogy, it could be great. they'd have to retcon a ton of stuff. But man - I'd love to see a fresh take that makes sense.