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

JOY_AXIS_DEADZONE

CS:GO

This console command dictates where the deadzone is on your controller sticks that will stop feeding back movement to the game client.

Syntax
joy_axis_deadzone [Deadzone]

Description

This console command dictates where the deadzone is on your controller sticks that will stop feeding back movement to the game client.

Syntax And Arguments

joy_axis_deadzone [Deadzone]
Deadzone How much of the zone of your joystick to be the deadzone. Deadzone areas don't report inputs to the client. The default value for this command is 0.2.