Western Rome had pretty bad 3rd century as well. Luckily there were no serious contenders around. [1]
As for Eastern Roman Empire it lasted for several centuries but after VII/VIII century and loss of Africa, Egypt, Syria (main sources of manpower and grain) it became only local power at best.
As for Eastern Roman Empire it lasted for several centuries but after VII/VIII century and loss of Africa, Egypt, Syria (main sources of manpower and grain) it became only local power at best.
[1] https://en.wikipedia.org/wiki/Crisis_of_the_Third_Century#:~...