It is highly recommended to use the -noforcemaccel -noforcemparms -noforcemspd launch parameters in the Steam/Game properties, though m_rawinput "1" usually supersedes the need for this in modern builds.
Do not set ex_interp 0 . CS 1.6 defaults it to 0.1. On FastCup, 0.01 gives you crisp hit registration without the jitter. fastcup cfg cs 16 vk better