Just because Jar Jar is the most obvious complaint doesn't mean it's any less valid. Jar Jar makes the Ewoks look like Boba Fett.
But you forgot redundant space politics, over used CGI, wasted/bored actors, stilted dialogue, empty spectacle, biggest disappointment in movie history, etc etc.
At least Keanu fit the role of a clueless, naive guy who learns of a mind-twisting revelation. How did Yipeee boy fit Darth Vader? Oh that's right he didn't. He added nothing to the story or character at all.
Oh and regarding the "loser" who made the one hour youtube video. I'd like to see you make a 10 minute video defending TPM that is one-tenth as insightful as Mr.Plinkett's video. He hasn't had a worthy rebuttal yet.