Family Conflict Over Spending Habits

I’m not crazy right? I’m not being irrational? Bc I’m fighting my whole family group chat to not waste $200+ to go out and eat at an expensive restaurant when we need groceries. It took me an hour to find ingredients to make a peanut butter and jelly sandwich. My parents are horrible with money and my siblings encourage them to spend way too much on useless things and things we can’t afford. Going out to eat is nice but they never buy groceries and only go to Mc Donald’s every day of the week. We never eat at home and now they want to spend all our money at a restaurant so they can say groceries are too expensive. My body craves fruits and vegetables, not greasy burgers and sodas. Diabetes runs in my family too, I’m not trying to end up like them. Plus fast food makes me so sluggish and depressed. I can’t stand it!