On the day they are born, you tell them they are already a bad person.
Some of your children are poor or happened to be born in a dark corner of the room, so you allow them to go without health care and suffer horrible diseases.
The diseases they suffer from were of your own invention.
You decide to create chaos to "test" them, and send an earthquake to destroy their home.
One of your daughters and son in law move away, become rich and happy while failing to adore you, so you destroy their entire city with a volcanic eruption.
You tell you favorite children to make war with your least favorite children.