Why rational investors should have much larger startup portfolios
if there should be an article to discourage people in investing in startup or creating a startup should be this one
Show me the incentive, I'll show you the outcome.
You are trying to build an index on venture because you are trying to convince people to invest through your platform and disrupt traditional venture capital. So this story fits your agenda nicely.
What you failed to put into your math was variable power law formulas by stage. Later stage looks more logarithmic than does early stage. You also failed to include the concept of follow-on investing, which is how the majority of fund dry powder creates more certain returns - if those dollars are wasted on power law distributions, they'll fail to get the lower loss-rate (and lower MOIC) returns that help boost returns once the few winners are known.
Your company has a future in venture, but trying to do venture math is obviously not your strong suit.