In science fiction and fantasy, there is normally a cornerstone culture, central to the story, that is malevolent. It is oppressive of its citizenry, setting the stage for the rise of a hero, an avenger of the people.
There are two words to describe such a culture:
Both words define a world that is the opposite of Utopia, or paradise: a world of deprivation, horror and exploitation. Usually the people are enslaved, if not physically, then through economics or some psychological method. Or earth changes, like global coastal events caused by meteor strikes or the aftermath of world wars, have disrupted normal society and destroyed convenience systems, such as the electrical grid or banking. Whatever the cause, the new world order is a system that grinds those under its bonds to grist.
Now that your imagination is twisting, turning, leaping and bounding with images, get writing!