Though it may sound depressing to compulsively find fault in everything, I've found that the benefits definitely outweigh the drawbacks.
Precious little in life gets fixed in the absence of a good understanding of what's wrong with it to begin with.
Years ago, I was stunned when one of my best friends (a very smart and thoughtful person) told me I was "the most negative person" he knew. And
So.......stop right now and go read the fascinating blog post entitled "Hypercritical" by John Siracusa, and all will be made clear.