Yes, communism is about rapid, ruthless modernization for nations where the price is the death of tens of millions of your fellow citizens who are backward compared to the West.
Tsarist Russia was a society where 50% of conscripts in the army during the First World War could not read or write, while the Germans had only 2% of conscripts who could not read or write. The same applies to everything else, from education to medicine to infant mortality. I think this can be applied to China in the late 1940s and early 1950s, where the country was also extremely backward historically and required modernization, although it was largely achieved through the influx of Western capital and the policy of openness (Chinese Nep).
And yes, there was a result. The Communists eradicated illiteracy in Russia. They created an industrial base, and they moved people from villages and wooden huts to apartment buildings with heating, water, and electricity. I think this applies to China as well, where the average height has increased by 10 cm over the past 30 years, indicating an improvement in living standards and nutrition. Ultimately, it is a philosophical choice to determine whether the improvement is worth sacrificing the lives of tens of millions of people.