Every child has different learning abilities. No two brains are alike. The brain is made up of many different networks that help to learn. Some people learn better by seeing, others learn better by hearing and still, others need to do something in order to really learn new information. Some are good in academics, some are in curricular activities. But, Your teacher doesn’t have any right to treat you differently. He/She can’t insult you for not being very bright academically. You should understand that these things are affecting your mental health. You should talk to your parents about your teacher behaviour. Then, try to ask your parents to send you to a therapy as you are suffering from depression. You should take action as soon as possible for your better mental health.