If you take the regular, white, western centric view sure. Given that revolutions inspired and supported by the USSR continued for the entirety of the 20th century in many low wage countries there's definitely been plenty of struggle, a lot of which, still guided by Marxism Leninism is on-going today.It's not really a century of struggle though is it? I mean...you could argue it was 75 years of struggle but then 1991 came along and the hammer and sickle finally fell apart, its fallow ideology of a super state finally collapsing under its own weight. The clock pretty much stops when one of the participants is dead you know?
But even then, the struggle didn't really last 75 years did it? It lasted maaaaaybe 25 until after the war. And then the struggle was for the millions upon millions of people who died horribly under the communist regime. Although if the people are the state and the state is communist, then I guess you could say it was a communist struggle.