Since the OP asked for stories:
Grew up obscenely poor, welfare/section 8 kid, randomly homeless in college. In high school my mom got married to my stepfather, his income alone made me ineligible for financial aid out of high school — even though my parents and I fell out at the time, they made enough that the family contribution was expected to be nearly 100%. In actuality, they were working hard just to keep afloat themselves, so I never held it against them. Anyways, it was a catch-22, because there was 0 family contribution and 0 financial aid, so until I could fill while independent I paid out of pocket for college by working multiple jobs and stayed completely independent financially. That is not to say that I didn't rack up a lot of debt, even with working I had to cover some tuition and books/supplies with credit card debt. Interestingly, even applying to medical school I was denied from financial assistance because they consider parental income regardless of independence status. It sucked, but things do get better. Time is money, in the sense that it might take you longer to get to the same endpoint than if you had more money and given the same effort. I imagine, like a lot of other people, I didn't grow up with paid academic services: tutors, no MCAT tutors/courses, and things worked out fine. However, I do think poverty is a "meat grinder" and it's silly to assume that just because a few pieces of meat make it throw unscathed that the meat grinder isn't doing its job — i.e. it's ridiculous to assume being and staying in poverty is always a personal failure. Poverty is a viscous cycle, it gives people less options. The options left over are usually pretty bad e.g. having to choose paying for school or rent, or almost predatory in nature (e.g. payday loans, furniture rental, arguably Black Friday, etc). There's a lot of pitfalls to avoid, but you're young and have a lot of opportunity ahead of you.
But there's only one way to success, and with few notable exceptions, no one is going to do the work for you. I won't blow smoke up your butt and say life is fair, or that we live in a meritocracy. I'll just say there's still 9 more holes of golf to go, you have a handicap added to your score, but if you play your butt off you can still do just fine.
People do make it out. Feel free to PM me.