Your mother takes your money. Not a new concept to me as I help pay for the house bills, but I come from a much much lower income family. Why exactly does she need your money? Also, its not your money if you dont work for it.
You don't want to get a job in food service? Well guess what, I thought the same way till I found out that the only starter jobs you can get unless you have superior connections are in food/customer service (Min wage). Your aiming too high.
You have a car, I am much older than you and I can't even begin to afford one. How bout you get rid of it? That will save you a bunch of money. Gas, Insurance, get rid of it.
You can't do anything to your brother because he can throw punches now? What happened to "Paper VS Mountain"? You say your mother would side with him? That's odd, you said the exact opposite in your rant in that 'drink boy' incident.
The amount of stuff you get/have for free dwarfs what I have that I worked for and that alone makes me dislike you that much more.