[Nyororin]

Trust me - the grass just looks greener on the other side. Once you get over there, you will find that it`s already dead and has just been spray painted.

I had the experience of receiving "freedom" at about 13. I went from living with normal, maybe a bit old fashioned, "parents" (my grandparents who had raised me from a baby)... To living with my mother, who hadn`t (and still hasn`t) gotten past the selfish teenager phase of development. In other words, she thought she`d do what she had wanted her parents to do and give me complete and utter freedom. Plus, she was too selfish to offer up any "help". I wasn`t yet at the age to want "freedom"... And never actually got that far. By the time I was at that age I was trying to figure out ways to escape the situation, play down the stigma, and be a successful adult. Wanting to "do my own thing" never played into any of it.
Now, 15 or so years on, I don`t think I`ve changed much as a person. I just have the accumulation of actual life experience, and have pretty much reached the goal of productive adult life.

Anyway though... I don`t really see how being an adult would help any of the problems the OP is having.
Just to toss up the grim world of adulthood... And to show how it can actually *reduce* freedom...

Yes, you can drive. But a car isn`t going to drop out of the sky with a never-empty gas tank. As an adult you definitely cannot count on being able to use the family car - you`re free, just as your parents now are. They have absolutely no obligation to help you out or even let you live there.

So... You`re living alone, with a car you took out a loan on because you don`t have that much money but you need the car to be able to get to work... to afford to pay for your apartment, utilities, food, and the car itself.
Want to go out late? No, wait, you have to get up and go to work at 7. If you take the day off you`ll not "get in trouble" - you`ll lose your job and then your home and car. Want to buy such-and-such? Wait, if you buy it you won`t be able to afford to put gas in the car, so won`t be able to get to work... and repeat the above scenario. All your friends are getting together - but wait, you have to work to be able to afford to live.

Seriously - adulthood has an incredibly low amount of "freedom".