As Korean website Naver once said, China is like a great wall for Korea.In recent years, their attitude has become increasingly hostile. The Japanese are slightly better, but the Koreans are very bad. Korean films and TV works always deliberately portray China as a very bad country, and show off that they are better than China.
For me, it is a very arrogant idealism.
I watched some Japanese discussions on "Black Myth Wukong" on ltaaa.cn. Their attitude was very contemptuous, believing that this was just a poor imitation behavior following behind Japan. Even though Ubisoft has humiliated them with black samurai, they still firmly believe that Chinese elements are not as popular as Japanese samurai and ninjas.
Of course, this is only the opinion of some people, but you can intuitively feel that they do not expect China's success.
Whenever Korea wanted to be great, China just said no and that was the end of it. It's even more humiliating when sometimes the rulers were Mongolian or Manchus and they still said no, maybe even more harshly.
So of course they want to say China is below them. If not, then what future is there for Korea? Japan is probably thinking the same thing.