blame, censure, condemn, criticize, denounce, dis(also diss, slang), dispraise, fault, knock, pan, reprehend, slag(chiefly British)

skewer, tweakassail, attack, blast, clobber, slam, slashnick (at), snipe (at)beef, bellyache, bitch, carp, cavil, complain, crab, croak, fuss, gripe, grouse, growl, grumble, kick, kvetch, moan, murmur, mutter, niggle, quibble, whineadmonish, chide, drub, rebuke, reprimand, reproach, reproveberate, castigate, crucify, excoriate, flay, gibbet, hammer, keelhaul, lambaste(or lambast), lash, pillory, scold, upbraidbad-mouth, belittle, decry, deride, discommend, disparage, put down

find fault (with), take to task