I recall that in 1959, commentators were referring to the previous decade as "The Fabulous Fifties," while the new decade was dubbed "The Soaring Sixties," but neither of these nicknames took hold.
My Top 5
1. Absolute Zero decade
2. Who left the 60s druggies in charge decade
3. Dejavu Dementia decade or Welcome back Jimmuh decade
4. Building a Pyramid Scheme to the Future decade
5. Government Grifter decade