Nothing is a switch that happens instantly. Every reversal of power results from a buildup. If you were to apply the same rubric to conditions a year before various revolutions, you'd probably call them failures too.

It's not "the contradictions of capitalism" that suddenly give people the initiative to change things. It's a long process of strengthening that makes this initiative possible, no matter whether it looks like "adventurism". It might come in waves, but each wave advances and supports the subsequent one, and you don't get anywhere if you don't start making waves.