Dissapoint

Disappointment, one of life's unwanted but fairly consistent aspects. Everyone had been disappointed at some point in time. In fact, many people got disappointed several times a day. Either being let down by someone who was supposed to do something for them. 

Or letting themselves down in failing to accomplish a task that they had really been set on doing. That was disappointment, and if there was one group of people who really knew how it felt. 

Then it was parents, who were used to being let down. 

Especially by their children. 

Kids messed up a lot. They got into fights. They failed subjects at school. Then even as adults, they made poor financial decisions and also horrible choices when it came to who to pick as a spouse, or a life partner.

That was how disappointing children could be. But that was just the way things were. An accepted and well-known part of the human experience.