Synonyms of fault-finding

1 Syllable
flak, cc
2 Syllables
pickier, grousing, peevish, fussy, complaint, picky, whiny, grumbly, nagging, carping, captious, waspy, quibbling, niggling
3 Syllables
nit-picking, petulant, querulous, cavillous, censorious, hairsplitting
4 Syllables
pettifogging, culpatory, exceptive
5 Syllables
hypercritical, derogatory, overcritical