Thank you for finishing this to end.
Now for personal thought..
Chapter 10 feels like the last 'decent' chapter, that it hinted on the human/hero finally make a move. But chapters post that shows nothing of sort and verily destroy the previous set ups.
Such as what happened to the fat king human kingdom? What about the other kingdoms? The demons are getting fierce so where are the oppositions?
Frankly this still has lotsa potentials to make things interesting, a 4D chess juggling on heroic stories tropes. But then ch 11 + 12.. what was that??
And last ch 13.. good demon lord it is painful to read. It is a very sad development compared to the blast of early chapters.