There weren't really famines in the USSR after the beginning, when they fucked up collectivization and then went through a long and brutal war for their people. Same thing with China. They messed up some stuff a lot but they were also basically the first two countries trying a new thing.

But capitalist countries have gone through famines as well, even more so because there have been more of them, and when they were in the same pre-industrial and early industrial periods of their development as well. UK controlled India went through its own famine due to human causes, there was the Great Dust Bowl in the US, basically half of Africa and everything that has gone on there, etc.