Only a truly dillusional individual could possibly still fall for the fallacy of believing that communism has never actually been practiced. To claim that the communism practiced in the USSR, China, Cambodia, Vietnam, Cuba, Venezuela, Argentina, numerous African countries, etc. were some form of “fake” communism is insane. They all suffered from the same fate. They murdered, starved, and imprisoned their own populous, and deprived them of nearly any political (and certainly any economic) freedoms. And their economies in most cases actually declined. And yet people like you stare at all of the evidence that is as plain to see as staring at oneself in the mirror, and you deny the reality.
All of these previous or current communist nation-states suffered from the same fate because communism inevitably converges toward this fate. People naturally want to be free. People are naturally self-interested. If you make self-interest a crime, you will need a police state to enforce it, because people will protest or want to leave. It is inevitable.
Che Guevara was not a rogue individual purporting to be supporting communism. Che Guevara was and will always be one of the faces of communism. He was a vital and important cog in the Cuban communist experiment, because without the state enforcing fear and harsh punishment for government dissent, the communist party could not consolidate and uphold its power.