So, in order to improve the gaming experience in PUBG, you need to make some settings both in Windows and in the game itself.

First of all, go to Windows Settings. Disable the increased accuracy of the mouse pointer to avoid unwanted cursor movements. It is also recommended to set the speed of the pointer to a value that will be located exactly in the center of the scale, for example, at the 6th division.

Now let's move on to the game settings. First, you should limit the FPS to 60 in the graphics settings. This will allow you to achieve a stable and smooth gameplay.
Secondly, set the overall sensitivity to 50 in the control settings section. This will help you achieve comfortable control of the character.
Third, set the vertical sensitivity multiplier to 0.7. This will allow you to more accurately control vertical movements.

Please note that these settings are recommendations and can be changed according to your preferences and the specifications of your system.