Why haven't countries been hit with ageism suits?

Teens have a LOT less rights than men. People got equal rights for blacks, women, and minorities, so why haven't teens been given more rights? Also, wouldn't the teens not having as many rights because of their age be considered ageism? Here in America, we don't even have our constitutional rights. We are not allowed Freedom of Speech, or Freedom of Religeon. We get in trouble for cussing at school, and oour parents choose our religeon. My parents even made me go to church. Isn't this imposing on our rights? Also, because of our age, we are not allowed to vote, drive, or drink (I am not talking about getting drunk. I am talking about having a beer with dinner), all because of how old we are. Why haven't the countries been sued for ageism? Please don't say it is because we are not mature enough. Adults are immature sometimes too, and there are immature people in EVERY crowd.