why wouldn't a coup de etat be in the works ( with China's blessings?)A military coupe might get dear boy leader out, but a military coup de etat isn't in the offing there. Not from within. Even if it did happen, the next strongman would become leader of the cult. It will take decades to deprogram that population, and that will not take unless they are also given a good life while it happens.
Generally military juntas are pretty sharp guys - replacing a regime that is screwed up by a leader
( el-Sisi comes to mind in Eqypt)
If the military is reality based ( and most are) and the regime is a cult of personality -surely the military can see getting rid of the strength ends that bizarreness rule, and provides the best outcome for all for an out of control leadership.