It is true that this game has a massive cheating problem. While the developers are banning a huge number of players every month, the reason the issue never improves is that they are only reacting after the fact rather than creating a real deterrence.
The biggest issue is that under the current system, anyone can easily create a new Sub-Account for free, meaning a ban inflicts zero damage on them. Unless the developers increase the cost and demerit of creating Sub-Account, this endless cat-and-mouse game will never stop.
Even if they use AI to beef up their reactionary bans, it will do nothing to deter them.