A couple of tips, it is not necessary for the people around the MC to be "competent" when in the cannon it has already been shown that they are not, it just feels forced and utopian, it is not necessary for these people to be "geniuses" or " strong" authors always have this habit of forcibly buffing these people just to keep them relevant, now, the interactions with said "friends" are honestly bad, if you don't want to explain something you don't explain it, if you don't want to say something you just don't say it , but making them give him "stares" and feel forced to speak is like watching a Japanese anime with a beta protagonist, I see that the last chapters you try to put more "comedy" don't do it, the MC's arrogance is getting a little bit off Out of hand, you went from having a confident MC to a classical young master.
I don't know why you portray "solitude" badly, from my own experience I have had many friends and surrounded by dozens of people, but I found loneliness better, and in this fic you have Fleur, they are like two feathers from the same bird, honestly their " friends" are totally unnecessary, Luna is more of a comic relief than anything else, I don't understand why they always want to put her as the "last boss" who knows everything about you, it's annoying
In a world without magic, words win wars, but in a world with magic, a person wins wars, all this "such a person will be useful to me" or political things are more of a cage than freedom, no one will have more motivation to improve than someone who has reincarnated, no one will progress as fast, they don't have enough motivation as someone who knows a war is coming, please don't force a buff just to keep others relevant