You are just half as responsible for your failures.
Not even half.
If you look back and carefully trace what led to your failures (and successes) you will be amazed.
Whatever you are today or whatever you have achieved is a result of your efforts + talents+ a ridiculously improbable string of events, people, and judgments.
Ditto for your failures.
So, then, why so serious? (as Honda guys put in their Jazz ad)