Even if we were to disregard what happened to the drama, it's still not good. Right from the beginning, episode 1 was straight up bad and it never got better. Even as a stand alone Joseon or time-travel drama, it's wonky and tacky. This drama got more holes than a swiss cheese. It reminds me of one of those Isekai anime where the dude transfer to another world with his smartphone/knowledge/expertise or anything give him an advantage which also allow for a very lazy writing to fill up a big chunk of episodes.