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atelophobia

n. The fear of imperfection or not being good enough.

Wikipedia
Atelophobia

Atelophobia is the fear of not being good enough or imperfection. Atelophobia is classified as an anxiety disorder that can affect relationships and makes the afflicted person feel like everything they do is wrong. The term comes from the atelès, meaning "imperfect" or "incomplete" and , phóbos, "fear".