When we criticize and complain, we enter a spiral of negative thoughts that ends up affecting our mood.
Our creativity, motivation and productivity go down. We also alienate the people around us: It is not at all pleasant to work, or live with someone who is always complaining without offering solutions.
When you don't like something, find a solution.
When you can't do anything about it, forget it and concentrate your energy on projects you can influence positively.
Try it: Zero criticism and zero complaints for a week.
You will see!