Overall, I think this has the makes of a compelling narrative to adcoms.
You can easily portray yourself as an innovative and adventurous self-made man who discovered his academic gifts at an early age, and accumulated ample entrepreneurial experience (one that is naturally filled with both success and failure). This self-made man widely explored multiple aspects of what the business world has to offer, and is now ready to narrow his focus (through an MBA program) now that he has found his niche in the market.
From what I understand, everyone needs a "self brand"/"elevator pitch", from which the rest of your story develops. The above is an example of what yours could be in one short paragraph... with edits of course...
As for your academic and professional failures/setbacks (excuse me for dwelling on them, but I feel I should address it since you mentioned it in a way that stood out), here is one strategy to use them in a favorable way:
1. Your interests & experiences are numerous and diverse, it is only natural that you're good at certain things & bad at others. The multitude of failures just shows that you're not afraid of taking risks and that you can persist in the face of setbacks & difficulty. You should own them & be unapologetically proud of them. You can also use them to demonstrate the need for an MBA as a means of improving your future chances of success.
2. Pick 2-3 failures that are most memorable and use them for failure essays. If you write an articulate & compelling story about what you've learned & how you've grown as a result of a particular setback, I'd say that would make an interesting story to read for the adcom.
That said, of course, its always good to give greater emphasis to your successes and demonstrate a rapid learning curve/career progression.
As for extra-curricular activities, if you haven't done a lot, perhaps you can describe in-depth one or two success stories & highlight the impact you had in a quality-over-quantity sort of way.