Garren Jacobsen
Auror
I think you really have to look for what they do right as well. Because there's no doubt at all that those books spoke to thousands of readers and that Paolini still has a legion of fans. He's definitely doing something right. It may not be your cup of tea, but there are a lot of readers who love it.
I think critiquing books from a perspective of "what didn't work for me" is not necessarily very conductive to improving your craft.
Going over what went wrong is important. It's like watching game film, you go over what the other guy did wrong and right. You hone in and learn. But to make the critique valuable you need to do both.