When I was much younger and starting my first (fundably doomed) startup, one of my cofounders liked to say, "yeah, most businesses fail, but those statistics include companies trying to sell soft drinks to Eskimos and combination Chinese food/pizza restaurants". Then we'd all chuckle, knowing that the statistics most certainly didn't capture dynamic new technology firms like ours.
No. Most companies fail. Look at the list of dead YC companies. Those were screened by a team that has specialized in doing nothing but screening founding teams and then attempting to give them every advantage their considerable and growing infrastructure and connections can give them. And they still fail.
Because that is what startups do. They fail.
The best, most talented, most experienced founders in the world would presumably be among the first to tell you that you can't read anything about your self from the simple fact that your company failed. Learn what you can, but don't ever let it grind on you.
(Some people just shouldn't be in this game, for whatever it's worth, like Matt Damon said about the no-limit players in Rounders; not because they can't, but because it's not healthy for them.)