A failure means a threat to an individual’s security, which will be a barrier to doing it again. That’s the most horrible result for a failure.
Human beings enjoy glory, while failure breaks the expectation of glory. This also makes a failure unacceptable, especially in a society that admires success at a young age.
If taking life as an experiment, a failure is just an outcome of one practice. It’s normal. Clarify your experiment, and do it, accept the outcome, and revise it.