The gist of this HBR blog is that we often learn from things we have to take responsibility for but rarely from thing we only 'might' have been responsible for. Essentially, if we can privately blame a failure on someone or something else, then that's fine and we move on.

One thing that's important about this finding though, in the context of startups, is that a CEO (or indeed anyone truly responsible) needs to actively fight this innate behaviour.

The fact is, it's all your fault. You create the circumstances and environment, set the checks and balances and decide strategy. So when you feel the need to find someone to blame, look in the mirror.