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

M_MOUSEACCEL1

CS:GO

This console command sets the mouse acceleration value for its initial threshold, up to 2x movement speed.

Syntax
m_mouseaccel1 [Value]

Description

This console command sets the mouse acceleration value for its initial threshold, up to 2x movement speed.

How To Use m_mouseaccel1

  1. Enable the developer console in Counter-Strike settings.
  2. Open the console with the tilde key (~).
  3. Enter m_mouseaccel1 [Value], replacing bracketed arguments with the value you want, then press Enter.

This legacy command is not currently listed as compatible with Counter-Strike 2.

Syntax And Arguments

m_mouseaccel1 [Value]
Value The value you want to set mouse acceleration to for the initial speed threshold (up to 2x). The default value for this command is 0.