Did Rome have better governments during the Republic?

[buritobr]

Republic is better than empire not only in theory, but if we look at the history of Rome, we could think that the governments were better during the Republic.
There were insane emperors like Tiberius, Caligula, Nero and Comodus. There was a period after Comodus in which the emperors were removed through violence.

There was violent fight to the power during the Republic, when Julius Caesar defeated Pompeo and when he was murdered, but the Empire became much more violent.

[buritobr]

Was the Roman Republic doomed?

[buritobr]

You mean, the republic worked well when Rome ruled only the Italian Peninsula, but became dysfunctional when Rome controlled a big area including the Iberic Peninsula, Galia and northern Africa?