This manhwa should probably fall under the "Gag" category. (As in, if you came here for seriousness, you are in the wrong place.)
The FMC is dumb, the MMC is 'unrealistic with his motives and actions', and the other characters are kind of dumb as well. Just from chapter 1 itself, we can already execute several people for lese majesty and thats not even counting the fact that the Emperor had to secretly (and personally) assassinate an official when "he" is an Emperor.