First of all, you should calm down and think about what you really want. Life is not meaningless because you don't study well and people around you don't understand you. Ask yourself, if your idea is right, then you don't have to care so much about other people's opinions, and you don't have to complain that others don't understand you. But on the contrary, if you do something against the wishes of most people, it is not so correct, so you should reflect on yourself properly. Secondly, recognize yourself, you 12 years old. As a girl, there will be many wonderful things in your future. Learning is not for others, but for enriching one's spiritual world and becoming a thoughtful person. So learning is very important under any circumstances, and doing homework is just one of the forms to test your learning results. You're only in junior high school, and the study pressure hasn't reached an overwhelming level. What you have to do is to finish your studies patiently and step by step, and do your best to ensure that you will not regret mediocrity and will not have any pressure when you are old. Everything is late, do your best and wait patiently. Finally, I have to say that it is very unwise for you to choose the way to end your life to escape everything you face. If you choose to die without solving any problems at all, it is impossible to end all this. You think others will fundamentally understand what you have changed for you. Do you think you came to this world in 12 because you dare not face the world and take responsibility? Do you want to end it? Do you think this is punishing others? Can't! ! Don't! ! Wake up! ! Don't worry about this and that. You shouldn't worry about those things. You have time to go to your desk and study something quietly. Why do you care about others? No one can stop you from pursuing a perfect life, so look farther. Relax, the relationship between people tends to be infinitely harmonious, and no one intentionally infringes on your fundamental interests. In other words, when you feel that others have violated your fundamental interests, you have just realized your personal value. If you feel that your fundamental interests have been violated because of a word or advice from others, your values will still be improved. Try to blend in with everyone. Although you will encounter difficulties at first, try to remember. (twilight)

Having said so much (original ideas, please don't reprint them), it's up to you if you can't figure it out, but I believe you, since you have sought advice online, you still have a desire for life. Come on! Believe in your future!