Get Lost
It wouldn't be so bad if he would just be merciful and KILL them after stealing the fruit of their many years of cultivating. Surely leaving them alive is a rare form of Sadism and Cruelty. Yeah, I say that all of the time about MCs that maim people (in a world where such things can't be regenerated) or cripple people's cultivation—AND THEN ARE CRUEL ENOUGH TO LEAVE THEM ALIVE. You know what? I just lost interest in this story. I really enjoyed it there for awhile.