until you're 18, you have zero autonomy
adults will treat you like a baby because so many of them dont recognize young people as, well, people
you wanna buy sth? you better use your saved up 5€ or beg an adult for it and be seen as an annoying dumb kid, especially by adults not understanding your hobby
you have serious questions about sex or whatever? "you're just a kid, go do your homework or something"
you have gasp an opinion? well, you're a kid and therefor your opinion is wrong because i have more life experience