Use this instruction and choose PUBG executable. Don't turn off CFG globally - it's a major security risk.
Launch PUBG, go to "Settings" -> "Gameplay" -> and disable both "Replay" (see information to the right that it can affect client performance) and "Death Cam".
Downside for disabling "Replay" is none of your previous games will be stored on your PC for playing back but it won't take up additional space on your drive and for lower end PC's it will not affect performance anymore once disabled.
Downside for disabling "Death Cam" is you won't get the kill cam perspective of the enemy that killed you at the end of the game, instead you can can only spectate the enemy player or quit back to lobby.