In a probabilistic world, it is unreasonable to expect any one thing to succeed. At most, you can hope that of the several that were attempted, at least one will turn out as expected. That’s the genetic algorithm: try a countless number of things, and remember which ones work and which ones don’t.
There’s nothing personal about things that fail—or, for that matter, those that succeed. It is just the unfolding of a complex system, so better not be attached to any one outcome.
Success and failure are signals, not verdicts on your worth.