"Complaining as well as faultfinding and reactivity strengthen the ego's sense of boundary and separateness on which it's survival depends. But they also strengthen the ego in another way by giving it a feeling of superiority on which it thrives. It may not be immediately apparent how complaining, say, about a traffic jam, about politicians, about the “greedy wealthy” or the “lazy unemployed,” or your colleagues or ex-spouse, men or women, can give you a sense of superiority. Here is why. When you complain, by implication you are right and the person or situation you complain about or react against is wrong. There is nothing that strengthens the ego more than being right."
January 1, 1970
https://en.wikiquote.org/wiki/Complaints