Because the boy wasn't doing his job right. I think he lost sheep.
Frustration is the answer. An exasperated person could also be described as a frustrated person. And they both mean the same thing or synonyms
The phrase in the excerpt from a 1964 interview with Malcolm X indicates that he is explicitly stating an opinion is this "<span>{I don't think that it} serves any purpose for the {leaders of our people} to waste their time fighting each other needlessly."</span>
When Bostein clearly stated that ' the rules of high school turn out not to be the rules of life ' he apparently meant that the social-scale in a stereotypical high school is considered fake and has no purpose whatsoever in the outside world. Meaning that appearance and athletic status will not apply or be necessary to any sort of work in the 'real world'.
It helps you figure out what you want to investigate and how.