My sixth form has just switched me from A-levels to BTEC and honestly I've never felt more depressed. They think that I'm struggling in business because of the feedback they got from my business teacher (who is the WORST teacher in the world btw). The truth is that I understand most of it but she doesn't think so because I never volunteer or expand my answers. I am an introvert so I obviously don't speak much in class. But she, and the head of sixth form, both believe I'm not capable of passing my exams. I want to be an accountant but I still want to do A-levels. What should I do?