Truly one of the worst examples of kingdom build and magic novels. There is no magic here. Just replace names and the word "magic" with Chinese names and "Qi" Bull shit MC bringing "things he learned of in prehistoric novels" to magic world. First of all, stop. It's "fantasy novels" not "prehistoric". Second, there is no logic in this world, he can just "deduce" anything he thinks. Making pills instead of potions just because. Mc talking about "brining eastern practices" as he if personally saw martial artists in his last life instead. Also regarding kingdom building part there is none. There is no discussion of things he is doing, there is no tension no blowback, nothing goes wrong as he makes drastic changes. He says his subordinates to do something and shuts off in a room for months, comes back everything being done by his subordinates

MC knows too much and too little. I guess author is trying hard to make him not be too op, but also be too op. He does not know HP universe, but author makes MC act like he does sometimes. But my main issue is the LOTM system is hard magic system and introducing it to HP universe without explanation that makes sense just feels plain wrong, ruins the mood and does not really fit the soft magic system of HP universe.

Author wrote some random words and called it a story. MC in Minato era, and all facts before are mostly just wrong. The story starts when MC has been in this world for a long time - author casually just skipping the actual story part on how MC navigated this new world and just had him become the 'big brother' of the important characters. Also when MC talks about his reform, only BS come out of his mouth. Smooth brain trying to write a deep story but using childish views. Think of MC's words for more than once and it all falls apart.