Last month, the Los Angeles Times discussed "post-traumatic embitterment disorder." According to the article, the clinically embittered "feel the world has treated them unfairly":
Sounds like garden-variety embitterment to me. But anyway, here's an observation that has proved therapeutic for me: If the world actually lived up to your very high, meritocratic standards, you'd probably be even less successful than you are now.
(Via Psychology Today, via Arts & Letters Daily.)