I Was Dismissed from the Hero’s Party Because They Don’t Need My Training Skills, so I Strengthen My [Fief] Which I Got as a Replacement for My Retirement Money. Chapter 29 Discussion

This is fine. It's a typical story of adventures, magic, dumbass MC and waifus. But it's okay, I mean, this story aims to tell us about the MC an his daily life, he's building his reign and maybe he will become OP? Idk, but beyond the development of characters or the story, within what we consider the routine of a slow-life story, I think it gives us exactly that.