Because CKS was an evil war criminal, the vast majority of people in the world do not know that he once ordered the massacre of millions of Chinese civilians in Jiangxi and Fujian provinces, simply because the CPC had established temporary governments in these areas.
In addition, his wife also called for the United States to launch a nuclear strike on China during the Korean War.
You can't expect a madman who treats human life lightly to truly consider China's national interests; he only cares about his own family.
If CKS is actually a true Chinese nationalist who is a bit crazy, I could've still accepted that, but he had done multiple actions directly against Chinese interest, and contradicting his claims of being a nationalist. Including the partial agreement of the breakaway of Outer-Mongolia from China in exchange for Soviet's recognition of ROC as the legitimate Chinese government, which in the end didn't even helped him. The Soviets were extremely evil, but CKS should be the one looking out for China's interest and not doing the opposite, what he did is no different from the stupidity and incompetence of the Qing Dynasty while the evil Russian were always coordinated in their invasions in recent history.
Although I will also add that the CPC had also ceded our lands away to other countries (such as Central Asia, a portion of ChangBaiShan to NK, Outer Mongolia etc. etc.) which is completely unacceptable at all. In terms of damage, CKS did the most via his weak decisions on LiuQiu and being played by the Soviets on Outer-Mongolia (T.V. Soong, one of the Soong siblings, also had blood on his hands for this as ROC foreign minister) which started the domino on the official balkanisation which is unforgivable. These all must be reversed one day.
You can't expect a madman who treats human life lightly to truly consider China's national interests; he only cares about his own family.
agreed
his wife also called for the United States to launch a nuclear strike on China during the Korean War.
That is absolutely crazy if true, not only is it disgusting and cold blooded, isn't her sister Soong QingLing on the Mainland side?
No wonder there is a saying about the three Soong sisters, "One loved money, one loved power, one loved her country", referring to Soong Ai-ling, Soong Mei-ling, and Soong Ching-ling in that order.
P.s. T.V Soong, who is also a Soong sibling, is said to have a "tough negotiating style", but still betrayed China under CKS leadership in the end despite having some contributions to China before that.