nitpicking
🇺🇸
/ˈnɪtpɪkɪŋ/
🇬🇧
/ˈnɪtpɪkɪŋ/
paying too much attention to small, unimportant details
Instead of focusing on the big picture, he's always nitpicking about minor issues.
finding small mistakes or paying too much attention to small details
His nitpicking attitude made it hard to work with him.