My mother's grammar school art teacher told her that her drawings looked like she drew them with her feet.
At 55 years old my widowed mother did two things;
1. She went to art school and became VERY proficient in water color and etching. The entire family and all her friends have her art work as a memento of her talent. She passed away last year at 94 years old.
2. She decided to be a lawyer. She went to law school four nights a week and finished the course. She took the California Bar exam and passed it the first time. It took Richard Nixon THREE times to pass the bar.
My mother practiced family law from age 60-80 years of age.
Sad that teachers take out their own personal problems with vengeance on the children, even if said children are the BIGGEST pain in the neck. Not their call to do that.
Wow! Your mother had guts.