What does it mean that "democracy has failed"? In my opinion, the failure of democracy is that it appears unstable, and its superpower of kicking out lasts only

What does it mean that "democracy has failed"? In my opinion, the failure of democracy is that it appears unstable, and its superpower of kicking out lasts only so much. In that light, the surveys showing that people want military rule highlight the failure of democracy: it isn't likely to last despite its advantages. You'd think that the continuous replacement would make the public opinion more favourable of the system compared to rulesrs for life, and yet some prefer autocracy. Why is that? I think that's the missing question from this article and the real insight to be gleaned.