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

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)

knock, trash, tear down, challenge, attack, slander, defame, vilify, marginalize, deflate, decry, disparage, slur, debase, insult, revile, smear, repudiate, trivialize, demean, discredit, demonize, put down, malign, belittle, denigrate, badmouth, dis, deride, inveigh against, rip apart, mar, deprecate, scoff at, disdain, snipe

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)