Rather: Classic "I have no reading comprehension".
Where do you see a "tragic past"? The flashback outright ends with him making friends with who he thinks to himself as the devil.
The flashback showed that he never could control his temper and that his new best friend made sure he could lash...
Exactly, that way it can raise armies in such a way that no region gets depleted of manpower. Thus negating the economic burdens of large casualties for each region.
Qin becomes an army with a state, so to say.
Genocide is always a "mass" thing. Either use "mass murder" or "genocide". Mass genocide makes no sense.
In her case, it is genocide. Which already is the ultimate crime against a population.
"Autobahn" means "(car) highway" tho. "Auto" is "car" in german, it's the short form of "Automobil", "automobile" in english.
So unless they suddenly got cars, you'd better go with "Schnellstraße" for "highway".
And the "Demon" Lord is bad why? Because of the title? We know nothing about him.
If the demon lord was just opposed to the goddess then you have your answer. Divine bitch gets rid of him, the murderhobos eventually die and things turn back to normal after a few generations.
Vietnam, China, USSR, DPRK, Laos, Cuba. Literally any socialist state in history fits your bill. And their leaders never even had/have "absolute power". And unlike Singapore, the global hegemon fights them every step of the way.