Sorry to hear that. I hope it doesn't discourage you though. A bad score on a test sucks but it has absolutely no bearing on how "smart" you are or how capable you are of understanding the subject.

Try to look at math more like a video game. If you just rage quit every time you lose points, you won't even get a chance to have fun. You also won't have time to get good at the game.

Even if you aren't going to become a mathematician, I promise you a firm grasp of the key concepts (up through calculus) will help you immensly in life. Don't give up learning to speak the language of the universe.