Review Detail of Stompai in The Empress's Gigolo

I'm really conflicted about this novel, at first I was expecting a somewhat original kingdom management with the mc's ability to go back and forth between Earth and the fantasy world plus the fact that unlike most similar themed novel the mc doesn't become a lord or a king but need to work for an empress. But I was disapointed after reading so much chapters since about 70% of the story is about him "strolling" in the new world and taking out already made modern item from time to time for his own use (so basically no "building / upgrade" on the kingdom part) 30% is about him "strolling" on Earth thinking about what food he is going to bring back in the other world. But one thing that is set in stone is that 100% of the time he is going to act like a mentally challenged person, doing his best to annoy everybody around him as well as frustrate the reader (for me at least that was the case) TL,DR : A novel that could have been good and interesting to follow but that is somewhat ruined because of character design and story development.