Evil is a terribly subjective thing, but Kyros' Empire is a pretty harsh state.
Kyros rules through fear. She has Archons as regents, generals and enforcers, beings of terrible power that operate more or less outside the law, and rule through might alone.
The very foundation of the Empire is servitude. The primary law of Kyros is Your Life Is Not Your Own. Kyros owns every citizen of her Empire.
Breaking the laws of Kyros carries extreme penalties. Slavery, mutilation and death are the most common punishments, I don't think there are prisons of any kind (aside from individual Archons torture dungeons). Sentences may carried out on the spot, with no trial or representation, by agents of Kyros or her Archons. There do not seem to be any legal rights, and justice is largely up to the individual Archon to ensure and dispense. Some, like Tunon, are dedicated to fair treatment, but "fair" means fair to Kyros, not the citizen.
In war, soldiers and generals of the Empire may employ any means they deem neccessary to secure victory. This extends to genocide, torture and the destruction of entire nations. Kyros does not care about the lives or the suffering of those who do not belong to the Empire. She cares very little about Empire citizens as well, except that their lives belong to her. Enemies of the Empire have no such protection.
So, Empire citizens have no rights beyond the guarantee that there will be no war whithin the Empire. They are ruled by extremely powerful individuals and a god-emperor who all have terrible magical powers, and Kyros and her Archons use fear to control the population, who are subject to their every whim and fancy.
I'd say this goes beyond any empire in the real world when it comes to harsh, ruthless governance.
By many standards, this makes Kyros and her Empire evil.