You bring up valid points and valid concerns. However, as usual, it all boils down to opinion. I never felt like politics were too central to the prequels' plots. They were there, and they were expanded (Which I liked), but I never felt they were extremely political or that they were boring for brining politics and the Republic society. I actually enjoyed the world building quite a lot. Different strokes.
Regarding Anakin, I never felt I was supposed to cheer for him. When I was a kid and watched the original trilogy, I always pictured Anakin Skywalker to have been a whiny brat/dude with anger issues. The prequels gave me just that. I never imagined him as a stoic, goody-two-shoes heroe like many people did. So when it comes to characterization (Acting quality aside) the prequels delivered pretty much the Anakin I envisioned. His character was written (After Episode I) as a whiny, arrogant, cocky guy who believed himself to be above Obi Wan and Yoda.
I really don't see how I was supposed to like him, when he is constantly given lines belittling his own master in a very harsh way (Like in Episode II, when Obi Wan tells him his senses are not yet tuned, and Anakin responds if Obi's senses are) and acting like if he was better than him.
The way I see it, and the way I have always seen it ever since I saw the movies in theatre, was that I was supposed to dislike Anakin. And it succeeded. There were very few moments where I rooted for him. Most of his dialogue comes off as extremely arrogant and angry, like the teenager that wants to own the whole world.
It's actually quite nice to have a chat about this instead of the usual shit. I appreciate it, man.