No it's not. Russian and Chinese state capitalism turned two preindustrial countries into global superpowers in a matter of decades, and lifted unprecedented numbers of people out of poverty. And they weren't even communist! Communism has been tried in places like Catalonia and economically, it succeeded. Militarily, not so much, but only because all the capitalists turned against them. Capitalism is the bottom of the barrel when it comes to lifting people out of poverty.