Young Anakin never bothered me. He's 9...I know I was pretty annoying as a 9 year old. I'm sure most people were. The only things that really bother me with the prequels is some of the dialogue in 2 and 3 is really cringy, and now that we have Blu-ray and 4K TVs it's super obvious where the green screen was used (which was everywhere).
And of course Jar Jar, but after TPM he's not really involved enough to bother me too much. I always skip his episodes when watching TCW.
I just don't much care for any of the characters that aren't Luke, Leia, Han, Chewie or the droids. BB-8's cool. Finn was building up to be cool, but his arc with Rose just killed it for me. Everyone else is "meh" with a serious dislike for Not-Vader.