I personally find people like Lester Bangs, Robert Christgau, Pauline Kael, and Eileen Jones incredibly enjoyable to read. Some "creators" like Wes Anderson actually went to great lengths to get Kael's opinion.
One-upper posters are annoying, but barbs disguised as blandishments like Ratatouille's bug me even more.
Criticism, like music, can be done poorly by nearly anyone and have little meaning, or by someone who has trained and studied carefully. Consider the source, I guess?
By the by: Did you really just criticize my critical quote on criticism? Recurse you, RodericDay!
It's not as easy at it seems. A critic needs to have experience, knowledge, and a certain eloquence in order to have any kind of power or influence. And a critic does take risks every time he writes a piece. Should he write something bad, he may lose his reputation and his following. A critic has to be consistent over time as well - one cannot say A and then B about the same time 2 years later. It's more challenging that it seems, and that is probably because this line was written by a movie script writer who does not like critics.
Which was, incidentally, not a very good or meaningful Pixar movie whatsoever.
And I liked many of other Pixar movies, some of which are among my favorites.