Why do some people always can't pass, one thing can't pass, the weather is fine, and it makes them sad when they think about it?

Hello, some people are always upset, because of their personality, they are introverted and unhappy. One thing is to keep it in their hearts. If they can't get over it, they will get angry. Because they don't know how to share with others and don't want to say their thoughts and ideas, they will get angry in their hearts. A cheerful person will not think so, because a cheerful person will have a solution no matter what happens, because he will ask others for advice and share his thoughts with others, so that his pressure will not be so great, and he will not be too sad and angry.