難かたくせ

noun

fault-finding; nitpicking; complaining

Refers to the act of finding fault or complaining about trivial matters. Often used in the phrase 難くせをつける (to find fault with).

• 彼かれはいつも人ひとの仕し事ごとに難かたくせをつける。

  He always finds fault with other people's work.

• そんな小ちいさなことに難かたくせをつけるな。

  Don't nitpick such a small thing.