Also consider that voter turnout can be highest when meta level satisfaction is lowest. Voter turnout spikes right before revolutions and civil wars; this is exactly people saying that they consider the system illegitimate and want it scrapped.

This sounds like a Muhammad Wang fallacy. (Even if Muhammad is the most common given name in the world, and Wang the most common surname, it does not follow that Muhammad Wang is the most common full name.)

Perhaps the people doing the voting and the people doing the revolting are not the same people. The voters may be rationally concerned to hold the system together because they correctly surmise that the revolutionaries are about to tear it apart.