Abusive parents
One is to make it domineering and ignore it at all. It's okay to call names and hit people. Inside or in front of the door, there is a tyrant and a bully, but outside the door, like a spider that has lost its net, it suddenly loses its ability.
Indifferent parents
The second is to give him a cold shoulder or reprimand all day, which is worse than beating, making him cringe, like a slave and a puppet. However, his parents call them "obedient" and think they are the success of education. When they come outside, they will never fly or jump, just like a bird leaving the cage for a while.
The misleading of parents.
As for why they are worthless or even depressed, I think parents stifle their children's nature and increase their mental stress. If the guidance is not good, it is easy to get depression.