You appear to have a view shaped by the Nationalist propaganda. The Flying Tigers were mercenaries recruited from US Naval aviation and Marine corps because the top commanders were more sympathetic to Chinese plight. They were in China before Pearl Harbor, hence so-called "volunteers." Russian pilots, also called "volunteers," helped defend Wuhan before Americans got there. The demise of Chinese Air Force was a direct result of incompetence on Madam Soon, who for political reason had a hand in procurement and wanted to save money until the war started. The Chinese pilots were exclusively recruited from the upper class and generally lacked skills and capabilities to mount effective campaigns or devise innovative tactics. The Kumingdon so mismanaged the war efforts that in 1945 Japanese force could still launch successful drive across China to improve their line of communication, and when American air power failed to stop Japanese advances, the American Commanding general, general Chennault wanted to fly in ammunitions to Chinese ground troops, like general Stilwell earlier advocated, generalissimo Chiang Kai-shek (that is right, the husband of the first lady wasn't the president of China; in fact he lacked legality, but had legitimacy, for his rule during the entire war) refused because he couldn't be certain his troops wouldn't turn their guns on him and replace him with a competent leader. The performance of Chinese force during WWII was abysmal, which directly contributed to loss of the Outer Mongolia as the price for Soviets to open a second front against the Japanese. It is not just that Chinese troops were ill trained, ill equipped, and poorly led; they were ill clothed, ill fed, had no ammunition; the Chinese soldiers were worth more to his commander dead then alive because the commander could forge headcounts and pocket dead soldiers' pay. The entire government and the armed force were thoroughly corrupted.
I just cannot let you cast aspersion on general Stilwell without challenge. He did clash repeatedly with Generalissimo Chiang Kai-shek because he wanted to fight the Japanese and the generalissimo did not. He wanted to equip and train Chinese Army, but the generalissimo only wanted to maintain his control over elite Chinese units because that is how he controlled China. An American once asked the commander of the best artillery unit, after patiently inspecting German made 150mm guns, why he didn't move his unit to the front line and actually fight, he was astounded when the commander replied that he didn't want to suffer loss and no longer being the best artillery unit in Chinese Army. The Chinese Expeditionary force to Burma was remote-controlled by Generalissimo Chiang Kai-shek, who insisted that the entire force go through dangerous mountain range to retreat back into China rather than going to India. The units that obeyed and went back to Chine suffered such loss that they had to be reconstituted, while one brave commander took his troops to India saw his division forming the core of counter offensives later. The same commander, who was trained in US, would later train the main force defending Taiwan. Most of loss suffered by the Chinese Expeditionary force was non-combat causalities.
Madam Soon May-in, as you call her, was greedy, corrupt, clever in PR, and did more than her part in losing China to the Communists. Her meddling in politics made it impossible for Generalissimo Chiang Kai-shek's son to do even minor reforms to cleanse the government. Corruption was so bad that when a top commander correctly outed a Communist spy because the spy was above reproach, the spy correctly fingered another spy (they worked for different branches of Communists) in the Defense department because he was also clean, Generalissimo Chiang Kai-shek chastised his top commander for effectively saying no Nationalists could be clean. I couldn't make this up.
I suggest you carefully read all sides before making your mind. I hate the Communist with all my heart but the Nationalist lost the mainland because they were corrupt, incompetent, and organized themselves on a classical Chinese patronage system, which ironically the Communists are doing their best to emulate. The corrupt but all powerful bureaucracy has reasserted itself, as it has done for two thousand years. The choice is suicide now, by attempting reform, or suicide later, by doing nothing. All the wounds are self-inflicted. The Chinese Communists are wisely choosing to wait, as the Empress Dowager did during the last era of Qin dynasty. It is truly a tragedy. The Chinese revolution, it turned out, wasn't necessary.