Actually, I want to tell you some ways to deal with it, but judging from your grades, silence is actually better than explanation. If you talk too much, you want to argue. Then tell your parents, well, I'll just do well in the exam next time. Stop and watch me perform. As for how to learn math well, I'm actually not good at it. Stupid birds fly first. You should keep up with the teacher's lecture, don't listen to the teacher in class, complain after class, don't look for objective reasons, look for reasons from yourself. Read the textbook first, do exercises after class, and then find the corresponding exercise book. Remember to do more exercises and don't be lazy.