As
@Autumnal notes, the prequels capture many elements of democratic collapse and rising fascism, but I think they often fail to place these elements against a cohesive background. In Attack of the Clones in particular, the goals and membership of the key factions are vague enough that I'm not convinced even the writers had a clear conception of them.
Count Dooku, for instance, is initially described as a "political idealist", but we never see what the idealistic side of the separatist movement looks like and how it aligns (or doesn't align) with the corporate oligarchs providing the movement's military power.