frumpling

Example:He is a nitpicker and often finds fault with the work, even when it’s flawless.

Definition:Someone who finds and criticizes the smallest flaws or mistakes in work or in someone else’s comments or actions; a pedantic person

Example:She can be very picky about her food, always requiring specific ingredients.

Definition:Shifting attention to minor or trivial matters and not being satisfied until every point or detail is perfect