This world is too far gone for any sense of redemption. It's like trying to find redemption on a Daemon world from 40K. That shit just needs to be exterminated.
Redemption at this point just feels so forced.
Real "demons" (not the demon race we see here) don't roam the streets, there are no tyrants in power killing each other in an endless amusement for eldritch gods, there are still laws and systems of government in place, and those system aren't burdened under the weight of tens of thousands of years of forced pacification and servitude.
Let's not compare an apple to a heavily mutated semi-sentient alien Cthulhu-spawned version of an orange.
As the characters keep emphasizing, there are still many good people in the world, and it's also increasingly obvious the series is making a statement of how endless cycles of violence, revenge, and hedonism especially at the top levels of the countries or at the god's level, are the cause for the general moral rot. Without those, people can be steered to the right path. Raoul has already begun that by isolating parts of the population that aren't affected by said rot.
If you ask me, its not that difficult in relative terms to 'fix' this world. It doesn't even have social media like our world, which is the greatest barrier to combating homogenous moral rot.