You hate this teacher now, so you don't study the math he teaches, and use this as an excuse not to learn math well. Then you will regret this idea when you go to junior high school or junior high school or even get a good grade in college (for mathematical reasons).

The math teacher doesn't study hard because of his poor eyesight. In the end, the teacher has no loss, and the last regret will only be himself. Remember, you study for yourself, not for the teacher! Moreover, if math is good, junior high school, high school and even college exams are the most popular.

So you'd better change your mind now. You can learn less math you don't like every day, but you must pay attention when you study. When your math scores get better, I believe you won't hate the so-called class teacher.