Hey guys, i was wondering, how can i reduce the joystick sensitivity, because it's too bad to play with a high sensitivity, and it feels like a arcade game, i use a Playstation Controller. Thanks for attention...

Try this settings:

Go to Options -> Controls
Set Wheel turn to 90°
Set Wheel Turn compensation to 1.00

The best way is to go to Options -> Misc and setting Analogue steer smooth to 0.9-0.95