What is the reason why others deliberately make trouble?

The reason for deliberately looking for trouble is actually that some aspect of your daily life has caused him contradictions, embarrassment or humiliation! And he remembers to look for opportunities in his heart to avenge you. If a person deliberately can't agree with you in some things, the best way to deliberately find fault is to tell him the truth directly and ask why. If it is really your fault, then formally apologize to others! If not, then explain to him why you did it! Adults understand morality, interests, positions and right and wrong. Let him turn this corner and let go of his prejudice against you.