The new demon lord was quite confused, but pleasantly surprised. All it took to convert the human realm to the side of Chaos was... a good PR campaign?
The demon lord had never heard of health care. But their minions did love to fight and curse each other. So ample healing magic was the backbone of any demonic society.
The demon lord had never heard of "mutual aid." But their subjects did need to eat. Get housed. And ideally have ample drinks and drugstuffs for each demonic festival. Really this stuff has Demon Lord 101 levels of difficulty. Why did the humans treat it like a big deal?
The demon lord had never heard of transhumanism. But look, every lich started as a useless hunk of flesh. Do people really think succubi are just born into this world? And no goblin nor orc would deny the values of enhancing magic- even if its just a charm to be more personable and charismatic.
Maybe the demon's lord father failed because he was an asshole. Certainly, the demon lord thought so. Fucking "poisoning your well makes you stronger" my ass.
At least the humans did have their own understanding of chaos, something like it. Demons are a proud and free people! None of this borders, copious paperwork bullshit, or policing shit. Sure, he demanded a certain level of respect and authority from people, but that was mostly because someone had to get things done around here.
Man, this whole demon lord stuff is way easier than your dad made it sound. To be frank, he couldn't even sell the principles of Chaos to a impling. Oh well. Throwing off your family's bad reputation was in a day's work for a demon lord.