Essence making, the fat squirrel, the tree fruits, the peach essence
a "slaughtering demon", because he never slaughtered humans, only demonized humans! How convenient.
The empress and the prince are impressive characters and their interactions with the MC are very funny and deep. The "love interest" is absolute bullshit. The MC meets some random girl and a few chapters later they almost marry. Another few chapters later the girl is absolutely unimportant again and doesnt come back anyome.
For example the MC reveals that (s) he is the hidden warlock, the new top archer student, the clan leader of the phoenix clan and a girl, and everyone is just like "oh, cool, you got secrets".
Why does the MC act like a 15 yo when his mental age is 20+40+X? He should act like his grandfather, like the great general and hope of humanity he is! Even worse, in the later arcs he acts like a complete hot-head, rushing head-first and ruining his every political advantage.
He often talks about "warriors honor" and goes damning his opponents for doing underhanded stuff, and then does the same exact thing in the next arc because he has to "win at all costs".
What happened to all the schemes and tactical understanding? Where does the sudden focus on cultivation and "if you are strong, schemes do not matter" mentality come from. What is the use of that chess competition then?
If I am the chosen one, tasked with saving the world, and aware of all the mistakes the emperor will make, then I sure as heck am not comfortable staying a general in my next life.
Where did his family go? He has a father and brothers (who are kind of a big deal) and they never appear. Why go around begging for forgiveness in the beginning if they are unimportant?
The girls are all valiant, strong, can cultivate (the same as men), can join the army (the same as men), but can't enter politics? Author, if you are breaking your historical setting, break it completely...
Every arc introduces a new random minor character that has neither skill nor power and will disappear until called once more hundreds of chapters later, for a big "call all names" and pile on my enemies. Furthermore the MC plays in the "Champions Leage" with the emperor, King Song, his grandfather,... but then wastes time on minor matters and minor characters.
If I am saving every coin I can get to prevent the population from starving, I definitely won't go around gifting some random C-rank noble girl millions of Gold-Taels. The MC does.