I hate being called 'Lucky'

I hate being called 'Lucky' After my first few bad presentation experiences, i just stopped giving presentations in University altogether. Teachers usually give me around avg or below marks coz they dont obv want to listen to me as well and I'm happy with it. As the presentation approaches, my friends usually call me lucky that i can just rest and dont have to worry about presentation at all. And it always gets me mad. Never said anything to a friend about this but it hurts being called lucky for being incapable of public speaking etc. They're capable of doing things that i quite often dream about doing and I'm the lucky one here.