@llde @rona_shen You have to know that back in medieval times, intelligence divisions werent as competent as we have now. You have to be overly cautious for you to know if someone is plotting against you. The only way they get info is by abducting & torture, bribing and rumors back then. Oh and uh the Inquisition is basically the CIA of middle ages but for heretics declared by the clergy. They dont have tapping devices. They were also quite complacent in those things and only gather intel about rebels when there are actual uprisings or if someone was spreading rumors or if the king becomes insanely mad due to paranoia. It took us hundreds of years history before we got an effective intelligence network we employ today.
Only few nobles/royalty ever care to know fully their own country. Only the good natured ones and cunning ones who exploits are the one's who care to know the details. The rest of the nobles just indulge in their own havens, getting richer or getting into conflicts w/ others.
Do not compare the medieval times to modern times as there clearly a big gap to them. What the MC did is basically Renaissance but in isekai.