All of it.
My parents made too much money and I was not eligible for any grants. Parents said they weren't going to give me a cent for school so I'm all on my own, with no grants. Scholarships? I did very well in high school, participated in sports and other extracurriculars, and didn't get shit. I've been on the Dean's List virtually every semester, no financial help. In fact, since I'm in an engineering major, I now have to pay a premium price. So my tuition jumped over $1000 a year. I had part time jobs and it worked but only for a few thousand a year. Three months of internships does not cover nine months of other expenses.
Fortunately I got a pretty high paying job but I probably will have to work a second job until my late 20s or early 30s.
My university actually dropped 40 places in one year because of the high student debtload students carry. One of the highest in the nation in fact.
You seem to be in a very unique position that wouldn't apply to most people (and I don't think you handled it the right way, either). Most parents making enough money would help their children. If they're NOT helping you out, then they shouldn't be able to claim you as a dependent, and you will qualify for any and all grants (the problem is that this process wouldn't play out until your sophomore year).
I didn't do all that well in high school and had few activities my senior year since I was working all the time, but thanks to a good test score I had multiple scholarship opportunities (which I promptly fucked up, naturally). Are you sure you tried hard enough to apply for as many as possible? There is a ton of money out there! Also, when I got my shit together, I promptly was re-eligible for my grants and won two new scholarships. Maybe I was just lucky, but I wasn't the only one of my peers who were rewarded. Again, did you apply for all of the scholarships available to you?
Also, it all depends on what school you go to. Did you choose to go to the school that will give you the best value for your dollar? My college costs about $3k per semester for most majors, including engineering, and it's a pretty damn good engineering program for a state school (Auburn). Where did you go that was so expensive? And again, if your parents weren't supporting you, why the hell didn't you claim yourself and apply for grants? It sounds more like you just didn't get the right information or guidance to take advantage of the options that you had.