Maybe because college is aimed at something different? that's like comparing pears and apples. You learned a lot, but that doesn't replace college education/networking/etc (and college doesn't replace what you learned doing your own business either).
DONT. STOP. NOW. By all means get a job to pay back debts etc but KEEP GOING. :-) . that tuition you just paid will be for nought if you don't start your next company soon. (not suggesting you were going quit but beware that in your situation the worst thing that could happen is that you go get a "comfortable" job.)
Thank you for the encouragement.
$5,000 is less that the price of tuition, and I've definitely learned more than I ever did in a semester of college.