How do I deal with slightly hypocritical, and dogmatic parents?

Most of my problematic conversations with my parents are about school. I'm a good student but when I try to express to them my issues with a teacher and so on, they never understand. They undermine what I do and I don't know what else to do to change their mind. It's mostly my mom. She gets on my nerves so much, no matter what she has to contradict whatever I say. Everything I do is wrong every decision I make. Just watch me go have , get pregnant, and do heroine. Then she'll be wishing for the old me back.