Let’s go with one of your examples, and I think the quintessential one: France, 1792. The monarchy is crumbling. It’s terrible. Let’s burn it all down. Yay! The monarchy is over!
Wait, what now? War with Austria for no reason? Executing tons of nonviolent and political prisoners? Terror as a form of government (that killed more peasants than aristocrats)? Coups and counter-coups and then Napoleon who plunges Europe into basically the zeroth world war. Millions die. Napoleon is eventually defeated, twice.
What came after? A slightly reformed (1814), and then slightly more reformed (1830), Bourbon monarchy. Boy, I bet the third estate might have preferred to get to that kinda boring reformed era a little faster and without all the dead people. (I guess I don’t blame the third estate, I blame Danton. But still.)