Why Is My Apprentice so Evil?

Li Daoran traveled to the Tianyun Continent and became the peak master of the Taoist Sect. He obtained the useless disciple system. As long as the more useless disciples you accept, the rewards will be richer. Unparalleled geniuses are hard to find, but isn't it easy to find trash? I don't know how many years later, Li Daoran looked at these apprentices, his eyes were dull, and he murmured: "Why do you feel like they are playing me?" "Master, after your guidance, I finally became a sword emperor." "Master, I have made a breakthrough, and now I can break stars with one punch." "Master, I can chop him to death with one strike, a big boss in the realm of gods." Li Daoran was smiling all over his face, but his heart was filled with despair. He obviously accepted useless people, so why are these disciples so different from each other? Evil disciple! Evil disciple!