My mom keeps telling I’ll get fired from my new job because my hair looks terrible

Do not shave your head just because your mother is a destructive ahole who refuses to give you positive reinforcement.

My own mother was just the same...instead, learn in your heart of hearts that your mother has severe problems. She is what is called a narcissist. A narcissist believes that their children are reflections of themselves.

She will always look at you and find fault...because she is so insecure, and has such low self-esteem.