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

M_CUSTOMACCEL_MAX

CS:GO

This is the console command that determines the limit for how fast your mouse can move depending on how fast you're moving it in real life. It can be set to have no limit.

Syntax
m_customaccel_max [Max Point]

Description

This is the console command that determines the limit for how fast your mouse can move depending on how fast you're moving it in real life. It can be set to have no limit.

Syntax And Arguments

m_customaccel_max [Max Point]
Max Point This value is used to determine the cut off point of you moving your mouse when the mouse movement in game will no longer get sped up. The default value for this command is 0, which sets there to be no limit.