Last chapter she basically said, "only lost children get eaten by these." It's pretty reasonable to expect someone, she has been told will save the world, to be more capable than that. Also, he heard the word "dungeon," and started treating this like it was a game.so she BLAMES him for her failures? such a moron. she would have gotten the same reaction with a living person who doesn't know what he can do..
she literally sent newbies to death because "Oh you can do this easily."
such a failure of a guide.