Final answer:
Chiang Kai-shek was disapproved of due to corruption and inefficiency, and his violent repression of peasants. After the Communist revolution, he fled to Taiwan, where he continued to lead the Republic of China.
Step-by-step explanation:
Chiang Kai-shek faced disapproval for several reasons, notably due to the widespread perception of corruption and inefficiency within his regime. He was also criticized for his harsh treatment of peasants, which further diminished his support among the Chinese population.
Additionally, Chiang's use of deadly force against protesters and his inability to effectively counteract the popular and land reform messages of the Communists under Mao Zedong decreased his legitimacy.
After the Communist revolution, Chiang Kai-shek and the remnants of his Nationalist government fled to Taiwan, where they established the Republic of China, which was recognized as the legitimate government of China by the United Nations and the U.S. until the 1970s, despite the existence of the People's Republic of China on the mainland.