There isn't a meaningful consensus on how many people died on their watch, but this claim usually targets the famines of '59-61 (China) and '32-33 (USSR), and casts the blame on the choice each country made to collectivize agriculture. The Chinese famine was the last one it has experienced to date. The only subsequent famine that the USSR underwent were in the 40s, which historians tend to agree was the result of infrastructural damage underwent during WWII. So I mean, yeah, people died on their watch. Probably not as many as you think, though, and certainly fewer than would have died if they continued on as semi-feudal agrarian backwaters.

It is easy to talk about this over 100 years. But that also conveniently lets us ignore that the US was founded on the backs of chattel slavery. Turns out lots of forms of governments can hurt people. But at least the communists/socialists raised all ships, whereas the racist policies of our 'democratic' government only raised a few.