One Planet for Everyone! Building Science and Technology Civilization at the Beginning

Initially the novel was friking amazing, great kingdom building, great progression, and great battle. But after the battle arc the MC was like fuck this kingdom building shit, I am just going the let the citizens do their own stuff. And unsuprisingly corruption, incompetent king, and civil war happens. Completely killing off the great progression they once had. The most thing I am sad about is way do this? Why abandon the kingdom you had build? Why destroy the prestiges of the kingdom that we are so font of had come such a long way?

P.S. Of the later in the chapter the MC did come back and 'rebuild' the kingdom to become more advance and so. But damn it, is it necessary to have the 'father getting the milk' arc in the middle 😭