I'm weak in math, too, but you have to understand that grades are not the whole of life. If you lose confidence in life just because your math scores are not ideal, how can you go on in the future? Mathematics in junior high school and senior high school will be much more difficult in the future.

First of all, what you have to do is to adjust your mentality, don't moan about yourself, you have to believe where you fell and where you got up.

Then, you use this summer vacation to arrange a timetable for yourself, work hard on math and make up.