[Crito]

I think you are misunderstanding this, due to poor wording.

That quote makes more sense if you replace "that investor" with "a investor". It seems plausible that founders have to deal with many founders, and it seems further plausible that many founders have had at least one bad experience.

9/10ths of founders having at least one bad experience with an investor and founders having bad experiences with 9/10 investors are obviously two very different things.

Of course we should obviously still be asking ourselves "what the fuck?!?"