I appreciate the point you're trying to make, and I agree taking responsibility for one's own life circumstances is the only way to improve them, but surely you understand that 'save and invest' is wholly unsuitable advice for someone with no disposable income or no income at all.
Who else is responsible for you?
You have two options. Continue to point fingers and complain and be broke, or start putting $100/mo in VOO and save what little money you have for your future?
I know it sucks. I know income inequality is huge. I know the only way out of this is to put in sweat equity. I know the only way to put food on the table is to have a second job at a gas station. I’ve been there. However, as much as you DON’T want to hear it - the only way out of your mess is by you working your way out of your mess.