Kim Il Sung's treatment of his people was characterized by a combination of fear, propaganda, and repression. He created a cult of personality around himself and his family, and he demanded absolute loyalty from his citizens. Those who were deemed to be disloyal or who expressed dissenting views were often subjected to severe punishment, including imprisonment, torture, and execution.
Kim Il Sung also imposed a strict system of economic control, which led to widespread poverty and food shortages. The North Korean economy was heavily militarized, and a significant portion of the country's resources were devoted to the military. This left little for the civilian population, and many North Koreans were forced to live in extreme poverty.
In terms of culture, Kim Il Sung promoted a rigid ideology of Juche, which emphasized self-reliance and national independence. He sought to isolate North Korea from the outside world and to control all forms of cultural expression. This led to a suppression of freedom of speech, religion, and artistic expression.
Overall, Kim Il Sung's treatment of his people was marked by a disregard for human rights and a desire to maintain absolute power. His policies resulted in widespread suffering, poverty, and oppression.