While these countries are definitely more oppressive and have less human rights than much of the Western world, do you really think that they've haven't gotten better in that regard with greater connections to the West? I don't think many would agree that these countries had better human rights and living conditions a couple decades ago.
As others have pointed out international pressure was instrumental in dismantling Apartheid in South Africa. That is one clear example.
As said, with Putin, I think things have only gotten worse. And China seems to be settling on a benevolent dictator, too, these days. So at least recently, I don't think things are getting any better in those two countries.
As others have pointed out international pressure was instrumental in dismantling Apartheid in South Africa. That is one clear example.