These complaints of course vary, but in general the main complaints and demands of people belonging to non-democratic countries is that they voices are not represented in government.
Explanation:
Compare: They have control over some of the same things like laws, military action, and who there allies are, They both get elected by the public, and they both chose when, where, and how things happen.
Contrast: The dictator has control over everything as one person and nobody else gets a say in things while in democracies there is a whole bunch of chosen people that chose what happen.