Look out, you're going to be labeled (paradoxically) as a "fanboy" for your negative prequel opinions!
I completely agree. The arena battle in AoTC was especially glaring in terms of bad CGI, IMO. The clone trooper that helped Padme up from the sand was utterly CGI as well - they could have used a man in suit for this scene, but didn't for some odd reason (maybe for consistency?). CGI Yoda looks bad as well, IMO, although his puppet version, while endearing, looks pretty bad too. Maybe there's no way to make a good Yoda!
Don't get me started on CGI Jabba...