you are right bro because a player with 3-4 k.d is safe than player with 5-10 k.dokay so the cheat only safe AFTER the game updated and the cheat updated. because many people push rank during the new season. so the pubg cheat security is on going with many "hack reports" from player. other than that, you shouldnt play a BIG map like miramar, erangel or vikendi. sanhok is safe( but depends on time). Livik is the most secure map to play but the players is madly crazy and pro so if you got skill issues better not to play pubg no more.
and dont play brutal or player will suspect you to cheat.
get K.d maybe 3 or 4. 5 can too but it doesnt really a problem.
you need to redownload the MemoryUI everyday.
Dont Use MAIN ACCOUNT!!!