Great explanation. Thanks for that. I haven't kept up with Thai politics since thaksin days. Their family as you correctly said are not anti china. both him and Yingluck made well publicized visits to china during their heydays or right after. With both cultural and political significance.
It does seem like thais in general have positive feelings towards china, same with Indonesians and Singaporeans.
I'm abit baffled with the chart though. You expect Pakistan , Japan , Australia to be where they are . But why in earth Koreans are biggest haters lol. They are even above those countries with actual territorial disputes with china.
Koreans have an inferiority complex vis-a-vis Japan/China when it comes to culture and history. So there is Koreans claiming Goguryeo and Confucius, revisionism about Gojoseon, grasping at Altaic family blood kinship.
Also, due to advancement of Chinese technology and industrial might, China and Korea are direct competitors in 37% of export items, ranging from mobile phones , shipbuilding (LNG, bulk carriers), semiconductors, EV batteries, electronics, automobiles, etc....
Add that to the legacy of Korean War... you have Koreans hating Chinese as much as they hate Japanese.
Personally, I actually boycott most South Korean products, precisely because how SK Ultranationalists behaves against Chinese on the internet (see Korean Sentry Forum before they went private-only).