First, analyze your own psychology. You don't study well for three reasons.
The first point: you have not laid a good foundation at all, and without previous knowledge, you will naturally give up in the later study.
The second point: what you lack is not perseverance, but confidence, which needs the encouragement of family, friends and teachers. I think you must have the psychology of "giving up on yourself"!
The third point: your thinking is incorrect, and learning is really boring, especially in adolescence, and it is easy to be disturbed by dazzling temptations!
Then let's think of a solution. First of all, the first point is to determine your direction, or your favorite interest or your ideal. People can't live without ideals, otherwise it's really useless! Then increase your self-confidence. There are many ways. Don't hurry to pick up the book until the problem is solved. Increase your human-computer interaction and make more friends. These friends are all kinds, such as excellent academic performance, cheerful and optimistic, because you need their help, and at the same time you will adjust your mood, thus increasing your self-confidence! Now "it is better to learn than to learn best". You can choose a course you like, study hard and improve the score of this course soon, just like a major. It's better to be a big class. You definitely have this ability, because you have far more managers than them. The purpose is to give you something called a sense of accomplishment. You need it. It will encourage you and make you more confident. At least in that class, you are the best, all the honors and honors. They will look down on you when they are away, because you are better than them in some ways!
After solving these problems! You have to work hard for the mid-term exam. Generally, the teacher will make a general review before the middle school entrance examination. As the saying goes, "It's the same reason that you can get into high school with normal scores on your back, but don't care too much about key and unimportant schools, where you can fly out of golden phoenix. It is said that the learning process in ordinary high school will be slower, which will help you to further consolidate the knowledge you lost before and make high school a new starting point and a new beginning.
Generally speaking, I am a person who has never been to high school or college. I chose technical secondary school and junior college. I studied computer software compilation, and now I work. In the IT industry, my skills are not bad. My job and salary are not a problem. You don't have to go to college. Now the society is very realistic. If you don't have a skill, it will be difficult to gain a foothold in society in the future. You can do all your homework. It is also common for college students to wash dishes in hotels!
Having said that, I just want to tell you that you are the strong one by doing what you like and being the best yourself!
Finally, I hope you can face your present predicament calmly, learn to smile at everything, believe that you are the best, go your own way and let others speak. Finally, I hope you can have a good communication with your parents and have a heart-to-heart talk with them to exchange ideas and opinions. They love you and will support you. With their encouragement, you will be more motivated and don't put too much pressure on yourself.
Wish you success!