South Korea was much more pro-American in the military dictatorship years. The last ten years they have returned to neutral, partly because China started wielding its big stick especially over THAAD. And also because of Korean Wave pride.
For what it's worth, ordinary Singaporeans are more pro-West than the elites because of cultural indoctrination. Lee Kuan Yew enjoyed sparring with Western intellectuals. Although there is a small minority of Chinese-educated Singaporeans who have always been fervently pro-China, which kind of re-proves the cultural indoctrination point.