“Repeated complaining rewires your brain to make future complaining more likely. Over time, you find it’s easier to be negative than to be positive, regardless of what’s happening around you. Complaining becomes your default behavior, which changes how people perceive you.”
The more you complain, the more you will find to complain about.
Travis Bradberry explains how complaining rewires your brain for negativity and suggests you counteract that by learning to implement solution-oriented complaining.
If you feel the need to complain about something, he suggests you complain with a purpose, be specific, and start and end on a positive.