Steam Community :: Guide :: How to fix mouse and keyboard lag in CSGO
CSGO laggy or sluggish mouse fix - YouTube
How to Fix Mouse Lag or Stuttering in Windows 10, 8, 7 PC
How To Disable Mouse Acceleration In Windows 10 - YouTube
If you experiencing strange mouse movements, and you feel that "something is off" with your sensitivity; turn off "Fullscreen Optimizations" in the Compatibility Tab of the csgo.exe properties. : r/GlobalOffensive