You gotta keep in mind that he's a veritable god living among normal mortals. There'd only be so much he could do directly without essentially "enslaving" manking to the horrific realization that there's someone out there that could erase them at a whim. Awe can turn into envy and fear very quickly, and charlatains wouldn't be above rilling people up against him to prop themselves up. And demands would never be far from him, I mean, no offense, even if this is comming out like it, be here you are demanding even more from him. Others would demand even more. And more. And before you know it, he is the one enslaved.
Plus, he saved 99,9% of humanity once already, that's plenty of weight for one single person to have carried. He isn't the planet's buttler to police every street and whatnot, forever, "under the threat of being called a bad person if he lets bad things happen".
He did better the world. More than "angels" ever managed after who knows how many do overs: not one person died in the war against the monarchs. It did take effort.
Reductive take.
Hes immortal, has near limitless loyal goons, power, can brainwash and teleport.
He has all the time to shape and nudge the world in whichever direction needed just doing nothing is horribly irresponsible.
He could show up and pronounce himself as the second coming of christ.
He could use his limitless shadow dude labor to boost progress in whichever direction be it infrastructure or agriculture.
Solve world hunger. Bring 3rd world countries up to speed. Help the entire world to go 100% green in record time.
Hell he could just call himself the demon lord and FORCE the world to act up and unite as one people.
Nobody is truly free everyone is living under laws and rules made by whoever at the behest of whichever money man decided to put them into power or are you going to argue that the illusion of freedom and choice justifies all evil and should be left undisturbed forever?
He has the time. The power. The incentive. Theres no reason for him to do nothing its unjustifiable.
Also lets not forget that they are still living in a fantasy magic god universe and his presence will keep attracting more wuxia bullshit forever so its not like there is any real chance for things to "continue as normal" in the first place.