This is a popular idea, but guillotine-heavy revolutions were pretty rare in the Western world, and modern revolutions in general, successful or not, were often a consequence of a lost war, not of usual misery in peace. Losing a war is dangerous for survival of any regime.

Peasants' revolts are another story, but too far back in history to be an useful analogy for today. They were also beaten to bloody pulp most of the time.