China has less aggressive policing because people know what will happen if they screw around.

Many of the issues in the USA are connected to China issues. Police are ordered to ruthlessly enforce some laws against some of the population while having a completely different standard for other laws or against other groups. These orders come from leaders under the influence of China or other subversive groups.

The other tyrannical problems listed by OP are also almost certainly tied to Chinese influence or that of other subversives.