So, first, let yourself believe that you are good. When you do something well, say to yourself "I'm great, I'm great"-to be honest, don't think it's funny. To cultivate your ability to appreciate yourself, record all this in a special book if necessary. In addition, don't "envy others and feel ashamed of yourself", and don't set too high a goal for yourself. When you fail, don't focus on the result of the matter, think more about the reasons for the failure. The result of your question just now is 170.
"Failure is the mother of success" will never go out of date, so encourage yourself more.