Interesting take, especially in the way it meshes/contrasts with my own. See, I never minded Jar-Jar. He's never bothered me. Yoda in the prequels bothered me much more than Jar-Jar. Jar-Jar and I have always been cool.
What bothers me? Well, it's in the next thing you said. You say it's supposed to be the backstory. I agree. But they're not presented that way. They're presented as the first three parts of the six part Star Wars saga. That's what bothers me. (And a lot of other things that I could go on about, but I'm with you in saying that I can sometimes sit down and watch them and relatively enjoy them)