The universal metric that all polities throughout history regardless of culture are undisputedly judged by are simply put, their ability to provide prosperity and guarantee the security of the people. Whatever one's political views of the conflict, how are ordinary Syrians on the street supposed to react to a military that, absent of serious Russian and Iranian support, can only manage to last 5 days holding a city of nearly 1 million people that never fell to the opposition during the course of the 2011 conflict? Even Ukraine usually can last months holding villages with a population of 30,000.
Objectively speaking, most people are not exactly in a position to be picky about who their rulers are. Their criteria really boils down to, can they make the trains run on time and can they make the killing stop? Morbidly, for nations that've been through war as much as Syria and Afghanistan have, the people usually eschew the former condition and accept just about anything as long as the latter condition is fulfilled. The Taliban for all the regressive policies they've implemented and outside of a few skirmishes with ISIS, by and large have brought peace. A shitty peace, but a does a population that's been through almost 40 years of nonstop war have any other choice?
What kind of rulers HTS chooses to be remains to be seen, but seeing the welcome that HTS militants have been getting in some cities, its apparent that Assad's reign was mostly built on violence rather than any sort of legitimacy. I mean, if he did have as utopian of a vision for Syria as some proclaim, wouldn't his soldiers be willing to fight harder for it? Not to mention lets get this out of the way, nobody in the region likes Iran and its militias.
HTS can very well become tyrants in the lands they occupy and the people will respond accordingly, but Assad is hardly Syria's savior if people are so welcoming to other alternatives.
South Korea collapsed into the Pusan Pocket at one point.
I wouldn't be surprised if the SAA does a South Korea in all ways when they retake the land. Assad is almost as brutal as Syngman Rhee and Park Chung Hee. Almost.