I’m 17 going to be 18 in October. [I Am a Teenager]

I’m sick of people thinking teenagers are stupid and don’t know anything!!!
My friends and I were told, “If course you don’t know! You’re TEENAGERS!!!! You don’t know anything about the world or owning a car!! You need to come to us first.”
I hate feeling dumb. Can’t wait to be an adult. Adults think we’re stupid.