At the Olympics, you will hear that the United States won a gold medal in an event. That actually means a team from the United States, not the country as a whole.
If “the world” is not treating you well, that would not be the entire world but just a part of it that you've encountered.
The word "society" is often used to refer to high society or the social elite.
The word "police" can be used to represent only one or a few police officers.
The "pentagon" can refer to a few decision-making generals.
"Capitol Hill" refers to both the U.S. Senate and the House of Representatives.