Like I said, everything that you have describe was not communism - it was a particular recipe for supposedly building it. And yes, that recipe was a massive failure, and few people on the left believe that it could have ever been anything but.

But here we're talking about communism naturally arising out of technological post-scarcity. What does that have to do with Soviet model of "public" (actually, state) ownership, or killing dissidents, or violently oppressing anyone?