Sure, I understand. But a comment saying just "I learnt nothing from that book." wouldn't be worth posting on here, not substantive. People talking about overratedness sound like they're on a mission to right a wrong. I appreciated your change of tack; originally I had sentences in my previous comment saying your first sentence read like you wrote it before you read the book, and your third like you wrote it after, but I deleted them. :-)

It is fascinating though how the most common subject in lists like this on here seems to be How to Win Friends and people saying it's great, other people saying it's overrated, not worth reading. Another thing I learnt from those movie reviews was that someone writing about why they love something is usually far more worth reading—is for much better reasons, says more about the thing—than someone not liking it, which often depends on arbitrary personal factors - not being advanced enough to appreciate it, being too advanced, feeling misled by the advertising or word-of-mouth, preferring or being used to a different style etc