High standards are common in sport. Research often splits perfectionism into two parts, and they seem to behave quite differently.
The broad picture:
Perfectionistic strivings: setting high standards and working hard towards them; often linked with motivation and, at times, better performance
Perfectionistic concerns: fear of mistakes, harsh self-criticism and worry about others’ judgement; consistently linked with anxiety, burnout and reduced well-being
The two can occur together in the same person
Being able to accept mistakes as part of learning seems to be protective
A practical reframe: judge sessions by what you controlled (effort, execution, decisions) rather than only by the outcome. A plan executed well on a bad day is still a good session.
A short, factual review after training, such as “one thing that went well, one thing to work on”, helps keep standards high without turning every mistake into a verdict on yourself.