Joker was an agent of chaos not anarchy.
Chaos isn’t necessarily the absence of authority and hierarchy, but the incapability of these to control a society. Under a chaotic society, you can still see police officers, a military, bureaucreacy, a State, politicians and such. But their powers and influence have been reduced and are utterly incapable , to the point their society has become chaotic.
An anarchy is the absence of authority and hierarchy to achieve order through a free and equal society. If there’s chaos, there’s no anarchy. (and any system that preaches freedom to foids is cucked)