"Garrosh did nothing wrong" is the rallying cry of authoritarian WoW players everywhere. It's okay, guys, his boots're big enough for all of you.
Garrosh is an example of why Byronic heroes don't work when you take them out of a vacuum. It turns out being xenophobic, refusing to listen to counsel unless it comes from a sycophantic yes-man or a manipulative serial killer masquerading as a sycophantic yes-man, standing for your own honor and glory only, and using others as disposable cannon fodder doesn't win you many allies when it really comes down to it. It does, however, encourage what allies you had to turn on you and cast you down in favor of freeing themselves of your idiocy. Which was kind of the point of Lord Byron's heroes in the first place--hubris and doomed moral causes lend themselves to tragic figures, not heroes with a long and illustrious career.