Stalin's trains ran on time. It was still an authoritarian dystopia. The thing about dystopian qualities is that they tend to nullify the meaning of any potentially otherwise good things.
It was not a dystopia. It had dystopian qualities but millions of peoples lives were better under Stalin then they had been under the Imperators. That’s the thing, even the worst nations we know of are not dystopias as dystopia is the opposite of utopia neither of which are attainable in the real world.