Soviet Union, China and Russia copied the US. They just didn't copy the "freedom" idea. They mostly didn't do it because they didn't have to... so they were very lucky. With modern technology, ordinary people got too powerful and it would be very easy to find out that the state is outright lying to them about how their own country works and they wouldn't be too happy about it. As a result, Chinese and Russians peasants are pretty satisfied with their leadership because the state doesn't have to engage in lying too much. They can tell the truth about the enemy once in a while and that is mostly enough.
If one of them was a superpower though, it would be a different story. They would have to engage in a lot of deception and with modern technology, people would find out that their leaders are full of it. Not that it is a problem, the peasants do eventually cope with reality... but it's just that it doesn't work very smoothly all the time.