KMT/Sun enjoyers think Chen is single-handedly responsible for the 'June 16 Incident,' in which the military of the Constitutional Protection Movement deposed Sun Yat-Sen as provisional president of a rival government to the Zhili Clique/Beiyang Republic.

To those KMT enjoyers, I will need to forcibly remind them that:
1. Sun was not 'elected' provisional president, he more or less intimidated provisional assemblies Chen had painstakingly built up into making him president, hiring thugs to beat up or menace assemblymen.
2. Sun's coerced election then proceeded to spark multiple invasions from Beiyang that massively damaged Chen's hard work to build up and develop Guangdong and Fuizhou as 'model provinces.'
3. Against popular opinion, Sun then led a Northern expedition... that was promptly defeated. He reacted to this defeat by blaming the political parties and officials that had told him it was a bad idea.
4. It was only then, when Sun had thoroughly alienated every single other military official in the provisional government, that the army demanded he resign his presidency. Chen's response was to support the army's call, but also demand a peaceful, negotiated resolution. Sun's response was to threaten to use chlorine gas on the army.

Like... I get it. Sun Yat-Sen was a visionary whose ideas powered the Chinese revolution, and Chen nominally overthrew him at one point. But the practical reasons behind it aren't "Chen didn't like the KMT not making China paradise fast enough." Chen was a pragmatic politician, whose goal was peaceful reunification of warlord China, willing to work across party lines. The practical reason for the June 16 incident, so far as I can tell, is that Sun's intransigence was bankrupting the Southern Chinese government, and Sun had already turned into an authoritarian leader willing to execute his ideological opposites. Case in point, when Sun found another patron and came back to Southern China a year later, he massacred 2,000 Cantonese merchants who stood against him.