On the contrary, considering the situation he was in and the factors he had to deal with : a) The threat from Dai Nippon Teikoku and b) the looming insurgency by the communists, c) the fragmented and regionalism of Chugoku , then I'd say that the manner in which Jiang Jieshi controlled the National Army was actually notable despite the odds.
There may have been problems in regards to corruption, but given the rather short term he had been in control and the external factors such as the imminent threat of the Imperial Japanese Empire starting in its invasion of Manchukoku in 1931 and then the outright invasion of Mainland Chugoku in 1937 , Jiang Jieshi had a lot to contend with. Fighting the Japanese and then the issue of national politics and then a civil war.
As a Japanese Nationalist and an Ardent Patriot, yet as a Student of History and a Lover of Chinese Culture, I have to understand that the Chinese National Spirit and the culture of resistance towards Japanese Imperialism is strong one. On that note, I think that if I were to step into Chinese shoes and think like a Chinese National Patriot, I would see that there was nobility in how Mao and Jiang Jieshi were able to put down differences and address the common enemy, Imperial Japan. Chinese people should not just glorify and idolize the CPC alone for the victory in the 8 Year Struggle with Dai Nippon Teikoku , rather, should appreciate the sacrifices of the Nationalist Army of China led by Generalissimo Jiang Jieshi, whose sacrifice for the national resistance was necessary for the preservation of the Chinese state.
It was shared victory, with much of the sacrifices done by the Nationalist Army in the 8 Year Resistance against the Imperial Japanese Empire.
That's why I believe Chinese people should appreciate both the KMT and CPC's sacrifices.
Regards,
Old Generalissimo Jiang knew a lot about geopolitics at the time. In fact, he was an ardent patriot. He time and time again denied offers by the Imperial Japanese Army to surrender. I think one thing we can all agree to is that Jiang Jieshi was an ardent patriot in context to the times he lived in.
Chill out, dude.
It was not by Mao alone. Do not forget the contributions of Zhou Enlai.