Would you consider bargaining with your mother to agree on something that you will do on a regular basis to help out? Have an open conversation with her as part of a NY resolution. Tell her you know she thinks you're a freeloader, but offer to (whatever) learn how to cook so you prepare say all the meals for the family during the week. Then she can see you're making a practical contribution, it's one less thing for her to do, you learn a skill that'd be useful when/if you move out, it won't cost you money you don't have and doing that thing means you miss out on the gross stuff so your brother cleans up after himself and gets to grow up a little. Present it like it's a win win all round, and think about how you're going to both do it and say it. So like subscribe to some internet channels on cookery (or whatever you choose), or get some books from the library, do the prep work beforehand. Basically show her you're using your imagination and creativity to help out, grow as a person and learn new things. Maybe start by learning how to make their favourite dishes. Make it your thing. Own this new whatever it is. Good luck!