The teacher insulted my father's career in class because of a little thing, and I am still the monitor. The whole class saw my joke and felt helpless and hopeless.

First of all, what your teacher did was wrong, and you shouldn't insult your father's career. Although the teacher was wrong and let the whole class see your jokes, you must face them correctly and don't feel isolated, let alone hopeless.

Whether a person has hope depends not on what others say, but on himself. As long as you are strong inside, for example, you don't value what others think and say, but you have your own opinions in your heart, and you will never be isolated or hopeless if you act according to your own principles.

Learn to be strong, experience setbacks, distinguish right from wrong, argue with reason, refute wrong statements, and win the respect of others with your own practical actions. Come on!