degrade, libel, slander, invalidate, censor, damage, doubt, dispute, discount, devalue, depreciate, deflate, call into question, diminish, smear, pronounce, discredit, blame, belittle, denigrate, poke holes in, reduce to, question (the validity of), disprove, refute, explode (a myth), damage (a reputation), cast in a negative light, cast doubt on, reproach, pin blame on, investigate (the value), depict (in a negative light), deride, tear apart, inveigh against

slam, charge, attack, libel, slander, defame, vilify, backstab, disparage, slur, insult, smear, malign, blame, allege, denigrate, reproach, inveigh against, denounce, lambaste, accuse, excoriate, fault, affront, mudsling, censure, defile, dig up, muckrake, foment, deprecate, calumniate, rake over the coals, sully (one's reputation)

point, frame, scold, charge, tear into, attack, insinuate, harp, chastise, berate, carp, throw under the bus, blame, reproach, pin blame on, lash out, accuse, proscribe, lay blame on, incriminate, rebuke, reprimand, lecture, ream out, fault, harangue, condemn, castigate, moralize, rant, find (fault)

hammer, unload, scold, pan, correct, critique, criticize, judge, chastise, berate, grumble, decry, discredit, belittle, deride, inveigh against, rebuke, ream out, air (a grievance), find fault, attack (with vitriolic language), take to task, rail against, savage

jab, bash, knock, sling, chafe, trash, stab, mock, imitate, wag, impersonate, tease, spout, caricature, exaggerate, decry, disparage, ridicule, insult, demean, dismiss, belittle, pooh-pooh, deride, ape, lambaste, scorn, snicker, snigger, make fun of, rebuke, scoff at, snort at, parody, snark, swipe at, roll (eyes), lampoon, spoof, satirize, deal (a blow)

bash, slam, hammer, abrade, unload, dump, trash, ventilate, vent, tear down, spout, backstab, chastise, berate, release, complain, grumble, gossip, put down, pick apart, inveigh against, tick off, air, rip apart, rebuke, ream out, take issue with, pour out, express (disdain), voice (complaints)