I've had a literary crush on Dave Eggers for ages. Here's his take on book critics. Check out the comments in that original post for more drama. 

Eggers: To enjoy art one needs time, patience, and a generous heart, and criticism is done, by and large, by impatient people who have axes to grind. The worst sort of critics are (analogy coming) butterfly collectors – they chase something, ostensibly out of their search for beauty, then, once they get close, they catch that beautiful something, they kill it, they stick a pin through its abdomen, dissect it and label it. The whole process, I find, is not a happy or healthy one. Someone with his or her own shit figured out, without any emotional problems or bitterness or envy, instead of killing that which he loves, will simply let the goddamn butterfly fly, and instead of capturing and killing it and sticking it in a box, will simply point to it – “Hey everyone, look at that beautiful thing” – hoping everyone else will see the beautiful thing he has seen. Just as no one wants to grow up to be an IRS agent, no one should want to grow up to maliciously dissect books. Are there fair and helpful book critics? Yes, of course. But by and large, the only book reviews that should be trusted are by those who have themselves written books. And the more successful and honored the writer, the less likely that writer is to demolish another writer. Which is further proof that criticism comes from a dark and dank place. What kind of person seeks to bring down another? Doesn’t a normal person, with his own life and goals and work to do, simply let others live? Yes. We all know that to be true.