Why stay?
I'm accustomed to hearing complaints about the 'situation in China for foreigners' which, in my opinion, is the expat variation of the domestic 'what happened to my country?'. Most of these unhappy souls eventually leave, return home, and become domestic curmudgeons.
You, however, actually acquired a Chinese permanent residency, not a small accomplishment. Why bother when

Pollution, corrupt schools,
censorship, human rights violations, human trafficking, massive fraud

Masochism or married to money?