NB! It seems this console command is not compatible with CS2.
Command Profile

JOY_ACCELSCALE

CS:GO

Sets the acceleration scale of your joystick, if you use one to play CS:GO.

Syntax
joy_accelscale [Acceleration]

Description

Sets the acceleration scale of your joystick, if you use one to play CS:GO.

Syntax And Arguments

joy_accelscale [Acceleration]
Acceleration The scale that you want to set your joystick acceleration to. The default value for this command is 3.5.