My first few days doing Maths in Advanced Levels was a nightmare. I usually sucked in Maths in high school and only because of my strong passion for
Tutor said I will not go beyond a simple pass even if I work my ass off. However, after two years of hard work, I proved him wrong by entering to University of Moratuwa, and pursue my childhood dream of a career in IT. It was the mockery at the class, made me strong and motivated me to bring out the best in me.
It's natural to feel humiliated and give up when you get mocked by others, but try to turn them into your own advantage. Don't try to avert them or defend them. Let them mock you! Just keep believing in yourself and stick to what you do!