I don’t really understand what kind of point you’re making, though. There are plenty of economic and political systems that can reach all the development and improvement to quality of life and literacy you want, yet they do it through horrible, brutal and harmful means. You yourself would be opposed to attaining these things you’re talking about through colonialism or slavery, or even through capitalism as I’m sure you’re also against social democracy like I am. My argument is that the means communist countries used to get to these ends are bad enough that I don’t care about the ends they reached. Just like I would never care about the ends reached by colonialist means.
I am not denying capitalist countries didn’t suffer from the same problems or didn’t commit the same or even more attrocities. This doesn’t excuse anything though. I am opposed to these things by principle, no matter who does them. And I’m not going to pick between two systems that do the things I’m against all the same, but one leads to prosperity quicker. I’m not playing that game.