Android Police has published an article looking at some of the problems in Jelly Bean. Personally I think the OS is great, but have witnessed the occasional glitch. Thanks to Paul.
In my reviews, I frequently abuse and pick apart TouchWiz, Sense, and MotoBlur. I point out flaws, say "that's stupid," and wonder what the heck was going on when someone approved whatever half-baked change they've come up with. A lot of the UIs shipping on phones today are bad.
But it's not just the 3rd-party skins. Stock Android isn't perfect either, and that's what we're here to talk about today. Jelly Bean has all sorts of confusing user interfaces, weird bugs, things that don't make any sense, and things that desperately need polishing.
I criticize because I care - that goes for Sense, TouchWiz, and MotoBlur too. I want the Android user experience to be good, and this is a big component in making it better - open, honest discussion of what sucks (and, hopefully, receptive developers). If you always think everything is awesome all the time, and that polish, "nit picking," and user experience don't matter, then you turn into desktop Linux. No one wants that.