I get what you're saying because, to a certain extent, my parents are similar but, you need to be the bigger person. You're now 18 so, you need to take on some responsibilities and become more independent whether your parents like it or not. You should learn life skills like how to handle your money, etc. by reading books or looking online. Get a job to earn money or go to university if you are able to. Try and work hard to move out and get a place of your own.
If you have siblings, talk to them and if you need support for how you feel, you should talk to a professional or someone you trust about it.
Don't sink down to their level. Be the bigger person...