nit-picker

nitpicker

Someone who is overly inclined to point out or complain about every flaw they come across (in or about something), no matter how small, petty, or insignificant. Sometimes hyphenated or spelled as two separate words. You might write me off as just a nitpicker, but you'll appreciate it when you get an A+ on this paper. This is why I hate going to the movies with nit-pickers like you. Instead of just enjoying what we watch, you have to criticize every little flaw you can think of!
Farlex Dictionary of Idioms.

nit-picker

n. a person who is hypercritical. Mary is such a nit-picker!
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • nitpicker
  • picker
  • pickers
  • nitpicking
  • nit-picking
  • be tight-arsed
  • Great oaks from little acorns grow, and Mighty oaks from little ...
  • great/tall oaks from little acorns grow
  • mighty oaks from little acorns grow
References in periodicals archive
Mohamed Salahwill always have his critics, the nit-pickers who pore over every facet of his game in pursuit of a flaw on which to latch.
Critics and nit-pickers have no place in your inner circle.
For the nit-pickers out there, yes - he signed in the last week of December 2017, but he wasn't eligible until January!
For the nit-pickers out there, yes - he signed in the last week of December 2017 but he wasn't eligible until January!
Nit-pickers asked: "What was he doing there?" Their own answer: "His domain being inland, he probably was learning from the Dutch who are experts in building amphibious structures, how he could construct a pier starting from the Quezon Memorial Circle, passing over North Avenue, cutting across EDSA and Rizal Avenue, down to Sangang Daan, and finally to Dagat-dagatan in Malabon."
But instead of celebrating that, the nit-pickers are trying to destroy her career before it's even started.
But whether or not you agree with the above criticisms, one thing is certain, 2014 gives Messi the prime opportunity to silence his nit-pickers.
He describes seven difficult types; a brief guide to conflict and how to handle it; and dealing with bosses, colleagues, staff, egoists, aggressive or lazy people, bullies, perfectionists, manipulators, stubborn people, those with poor morale, fault-finders and nit-pickers, gossipers, customers, complaints, office jokers, and moaners, groaners, and critics.
Using the FDA-cleared LouseBuster device, Hair Whisperers nit-pickers can now kill over 95% of louse and eggs in one single treatment followed by a thorough combing.
OK, so the nit-pickers among you will suggest I'm over-stating the point there, but read on and you'll catch my drift.
Let us not be classified as a nation of "nit-pickers" but a nation of tolerance and warm hospitality and where there is always a "croeso" to the stranger.
Nit-pickers might cavil that they should have cleared the paddock more quickly, but they communicated efficiently with the paying public and rapidly took the only course open to them of calling the meeting off.
Levitical nit-pickers. Grim-faced, white-whiskered, tweed-suited, fence-building elders o' the kirk.
What you are starting to hear, though, is the tired questions the nit-pickers and nonbelievers repeatedly raised in 2003 and '04.
Execs often face a board with many conflicting priorities--the cliche about herding cats comes easily to mind--encountering nit-pickers questioning everything from their choice of long distance provider to whether the association needs a subscription to The New York Times.