Someone who constantly criticizes in a petty way.

synoniem: niggler.

Roget 936: detractor, reprover; censor, censurer; cynic, critic, caviler, carper, word-catcher, frondeur; barracker^†.    defamer, backbiter, slanderer, Sir Benjamin Backbite, lampooner, satirist, traducer, libeler, calumniator, dawplucker^†, Thersites^†; Zoilus; good-natured friend [Iron.]; reviler, vituperator, castigator; shrew etc. 901; muckraker.    disapprover, laudator temporis acti [Lat.] [Horace]. ... meer laten zien

Pools: krytykant