Unfortunately CS:GO does not have cl_yawspeed but there is a way to set it from 210 (default) to 105 (its a little slow but its better than 210) and this is how:
1. You wanna creat a txt file and name it slowturn.cfg
2. Inside that file you want to copy paste this:
alias +slowturn "+speed; +left"
alias -slowturn "-speed; -left"
unbind X
bind X +slowturn
alias +slowturnr "+speed; +right"
alias -slowturnr "-speed; -right"
unbind Z
bind Z +slowturnr
(Replace Z and X with any button that you want to bind your slow turn bind to. If you only want the left or right you can keep one of them blank.)
3.go in game open console (you sould know how to do that by now) and type: exec slowturn.cfg
4.enjoy
P.s: thanks to FPS GOD for showing me this
1. You wanna creat a txt file and name it slowturn.cfg
2. Inside that file you want to copy paste this:
alias +slowturn "+speed; +left"
alias -slowturn "-speed; -left"
unbind X
bind X +slowturn
alias +slowturnr "+speed; +right"
alias -slowturnr "-speed; -right"
unbind Z
bind Z +slowturnr
(Replace Z and X with any button that you want to bind your slow turn bind to. If you only want the left or right you can keep one of them blank.)
3.go in game open console (you sould know how to do that by now) and type: exec slowturn.cfg
4.enjoy
P.s: thanks to FPS GOD for showing me this