How can the cheater situation be so different in the different regions?

Some problems may be due to high pings.
But..
High ping does not contribute to 1 shot killing every enemy from far across the map with LMGs.
High ping does not make you be able to drop a med kit immediately after firing a flare as a recon (without picking up tools from dead medics).
High ping does not make to be able to spawn on a new tank everytime instantly after you’re dead.
I encountered all the above situations. They’re obviously cheating.

If you complain about high ping, you may try Hong Kong servers instead of Japanese ones.