Teach you how to treat this education system correctly:
Everyone is saying: the stepping stone to the success of the university. It's true. What kind of country do you think we are? Can post-80s and post-90s change the secular view of more than 5,000 years? No way! Therefore, education in China and even other countries in the world is the basic factor to judge personal ability, which you don't need to refute, because of the trend! Moreover, if you don't pass your present efforts to enter the university, how can you have the opportunity to participate in the competition? Even if you do, you will be treated unfairly before you get it! Would you like to?
As for your idea of teaching yourself computer, it's a good ideal! But you lack a clear goal. The computer major in the university can at least guide you to complete your ideal in the direction, unlike your aimless study now! Learning is a long process. Many times you can't just rely on interest, especially at your age. If you understand it, you must implement it. If you don't understand it, you will understand the purpose of implementation after successful implementation!
Finally, I want to say: China's education has its drawbacks, but please think about it. Without China's education, could all walks of life in China have developed so vigorously? Is it because there are several turtles and kelp that our country has developed to this day? No, China's education only made most people buried, and very few people became elites.