expression, godan verb (-su)
find fault; pick holes; nitpick
Used when someone actively looks for flaws or mistakes, often in a critical or petty way. The object is marked with に.
See also: あら
彼はいつも人の仕事にアラを探す。
He always finds fault with other people's work.
そんなに粗を探さないで、いいところも見てください。
Don't nitpick so much; please also look at the good points.