How does it feel to be called a fool and mentally retarded by my mother all day? Especially in front of outsiders, how does it feel to insult yourself like this?

Rational communication, this kind of thing can't be tolerated, you must say it and let her and others know what you think. They are adults and should be able to understand. Maybe your mother is like this, but you have to tell her not to do this to you. This matter must be solved as soon as possible, otherwise it will leave you with a very bad psychological shadow. It is possible that the two of you will solve the problem face to face for an hour, and then spend 18.