My second submission to this post, sorry!
Had a math teacher in year 2 who said this: 'I wont teach you anymore math, as you are too stupid to understand it'... well, he wasnt kidding. Never taught me anything and I never learned it. I changed school some time after but at that point it was kinda too late. Never learned. But I did earn two bachelor later in life, one in fashion and one in childcare psychology. So did not need that math teacher to do what I wanted at least!