It is not that God creates bad people, but that some people cannot control their desires and become bad people. In the society before the Shang Dynasty, people's lives were very peaceful because of the three wise kings Yao, Shun and Yu. After the Shang Dynasty, some people's greed and greed for power led them to start seeking their own power. Do whatever it takes to achieve your goals. The most obvious one is during the Spring and Autumn Period when they compete for hegemony. Because the worst thing is the shortcut to your goal. Someone discovered this shortcut and didn't want to work hard, so he had to take the shortcut to achieve his goal. So he slowly became a bad guy.