The Misfit of Demon King Academy (WN) Chapter 20 Discussion

Start with demon king and hero want to make peace and they succeed (???) after that it become slice of life series with comedy where only MC who think straight. How about other, they become idiot, dumb, mindless npc. Up to chapter 20, this become very annoying

Really can't stand it, I want to give 1 star but I only read the first 20 chapter and maybe this series become better in the future, so 2 star