Don't feel bad by thinking how much other people make money from your work. Think it positively, think in terms of what you learned from the experience. I believe now you gain some experience of the product developement, and gained strong confidence that you can also build some product which will give u $1m. Now, if money is an issue, then stick to the company for some more time. But at the same time start work on some side project. Spend more time on your side project and sooner than later you will find some potential on that project. If you think it is worth it go for it!!!! don't look back again. You will reach your goal.