They establish the Evil Government or Empire in question as being obviously Evil to the audience by having it be nakedly and obviously oppressive in a way no current First World Nation is. It doesn't matter how many Bread Tube Video Essays go on for hours about how it's a perfect allegory for the real world's problems, nor does it matter if that's what the author intended, the average viewer is at best going to see it as a "cautionary tale".
And that's the problem, scaring the public with the variety of different ways things could be worse creates hostility to the very concept of change. In most of these stories the better freer society the rebels are fighting for is Liberal Democracy, the real world status quo. The official full name of the Rebellion in Star Wars is "The Alliance to Restore The Republic", that does make it technically speaking a Reactionary Revolution not a Progressive one, the kind Edmund Burke would call a Reformation rather then a Revolution.
We see how broken The Republic always was in The Prequels and Clone Wars, yet because The Empire is so blatantly worse people long for The Republic and are not even considering the idea of trying to build something new, or question the very concept of having a Galactic Government in the first place. The only value I ever saw in writing more Star Wars post ROTJ is attempting to address this. Instead the overarching narrative we're getting is that the New Republic's mistake was demilitarizing and refusing to take quick harsh action against the rising First Order, even though the message of The Prequels was that militarizing is exactly how The Republic became The Empire in the first place.
Andor is the first Star Wars project to actually really be this Genre. Star Wars may have "always been Political" but the politics was usually set dressing and framing devices and only remotely part of the main story in the Prequel Trilogy. The Empire was something our protagonists were under the threat of but never living directly under. Andor is the first Star Wars project to be perceived as some groundbreaking Political Manifesto, but it's not. The character in the second arc who's supposed to be the ideologue of the group never says a damn thing about the kind of society he wants to create, just a bunch of philosophizing about how highly authoritarian systems like the Empire inevitably destroy themselves, which isn't even true, Rome lasted Centuries.
Breadtubers really love to argue that every fictional Dystopia is either Fascist or Capitalist or both and the Right Wingers interpreting them as being in any way Socialist are simply not getting them. Unfortunately most Hollywood writers are relatively Centrist Liberals who do view Communism and Nazism as two sides of the same coin. I like Divergent, I only saw the first movie but I found it more engaging then The Hunger Games. However the society it depicts can't be viewed as Capitalist nor does it contain any of the things that animate actual Fascist movements. Even watching it as a Communist I see it as what it looks like when Communism is tried but goes wrong, or at least what Liberals think it looks like when Communism is tried and "inevitably" doesn't work. Of course when I first watched it I wasn't the Communist I am now as you can probably guess from my first post mentioning it on this blog.
Classic CyberPunk is often alleged to be where Capitalism will inevitably lead if we don't change course. The problem is most viewers won't see it that way not because they are stupid but because CyberPunk is stupid, it is a fundamental misunderstanding of Capitalism to think it would ever benefit the Capitalists to get rid of the Government.
Here's an informative YT video on George Orwell.
The Anime 86 is more interesting then many other Dystopian shows because the Republic of San Magnolia actually claims to be a Democracy.
I have now watched the Anime Psycho-Pass (only season one for now which I'm pretty sure was originally meant to stand on it's own). And I'm going to Spoil it.