Economic growth itself is just a number, development is what matters. In addition and as a part of development I also specifically mentioned education and improvement of quality of life. You could add literacy, housing, levels of nourishment, and much, much more.
I won’t argue about history or its interpretations with you now. Just consider the path to development wealthy capitalist countries took, which involved slavery, colonialism, genocide, brutal worker suppression, and perhaps the worse working conditions in history during industrialisation.
You may attribute many horible things to communist countries. I might argue much of this is exaggerated by the media of the anti-comunist country you live in. Even if it is all true, developed capitalist countries did the same to themselves, and other peoples around the globe.
Then consider the development communist countries have had compared to undeveloped capitalist countries. People can have better lives, that is what matters.