caviller or caviler:
(also ‘quibbler’, ‘pettifogger’; plural: ‘cavillers‘/’cavilers‘; pronunciation: the letter ‘c’ is said with a ‘k’ sound as in “king” — for the right pronunciation of this word, please click here)
‘to cavil’ = to find fault with others; to raise petty objections
a person who complains unnecessarily all the time;
a faultfinder;
a person, especially a member of a committee, who raises very simple but annoying (petty) objections and disrupts the meeting,
e.g.
Monica is never asked to attend any meetings of the patent-teacher association because she is a well-known caviller.
Most people think that a supervisor overseeing a gang of workers is nothing but a caviller who always finds fault with the workers.
