Heya fellow CS player
Yeh its kind of a Pain the whole 3 button thing but it dus it to everyone i get the same problem when i press 3 keys at once it dus my nut in
but if i want to go digonally i just hold walk and forward then use my mouse to the direction am going to

hope dis info helps

but if ya lookin for anyone to get any more helpful tips on CS
Clink here ->
Soldiersofchaos.tkam [SoC]Carmon btw