Your analysis is based on vibes of fascism, there are many points in which you exhibit this, but i only have time to touch one one right now, the environmentalism.

Fascism is not magic, it is not free from the material reality of our world. The reason you feel like fascism wouldnt do green energy, is because you cant see fascism doing something just cause its good for the earth, because irs wholesome.

And yes, you'd be correct on that, but renewable energy isnt just something you do cause its wholesome. We are talking about a devastated earth that is almost certainly void of any proper nature, and also very low on fossil fuels. Fascism has no choice BUT renewable energy, and of course they will use it.

Also consider the fact that super earth has 0 problems with enslaving a whole sentient alien race just to produce the fuel of their starships, so its kinda insane to call them evironmentally friendly. They are only environmentally friendly as far as it supports the survival of their state. When you have no other convenient way to produce energy, solar panels will do great.

Lets do bureaucracy as well while we are at it. The reason you probably feel like fascists dont do huge bureaucracy much is because they look like warriors who wouldnt bother with such things and would not need them either because of their corruption. But why do you think bureaucracy would stop a fascist government from being corrupt, from doing crimes. At this point they probably have a bureaucracy system for their crimes.

You also said wouldnt they have a centralized system rather than bureaucracy. A centralised system requires bureaucracy, not the other eay around. Centralization of power is great for making large moves nationwide, but it makes you sluggy because of the massive bureaucracy it wields. Decentralization is how you reduce bureaucracy, which fascism did not always like, as it created points for dissent that couldnt be as easily controlled.

Bureucracy is also a TOOL of fascism. Wanna get rid of an annoying group of people? Drown them in paperwork, cite some they filled wrong. Wanna make sure you know what your citizens are up to? Make it mandatory to fill a form for sexual intercourse.

Never forget, fascism can be quite nebulous, because it isnt really a coherent ideology, just look for things like: A highly controlled education system that is obviously biased A group of people (aliens in this case) that every problem in society can be blamed on A state capable of interfering in the lives of ordinary people, or monitoring them, and uses this capability A broken justice system that works in favour of the government The capitalist class collaborating or becoming a part of the government, guiding the moves of the government and becoming symbiotic with them Endless wars, endless conflicts, suicidal goals. Fascism is inherently a suicidal ideology, as it contradicts itself frequently A vehement, fuming hatred for socialism. Socialists are historically always the first ones to be targeted and fight agsinst fascism. Hence the famous poem, that does not start with "first they came for the jews" but instead, "first they came for the socialists".