my mouse+kb fps vocab is fairly high now despite it being a fairly recent thing for me (beginning of 2015 was when i first played pc fps at any real level). one solid tip is to lower your sensitivity. whatever it is – lower it. it’s like a free way to get better at aiming. yes you will have to move the mouse more. buy a bigger mousepad.
maybe not this low.
solid.
have you tried ESDF instead of WASD? easy for your fingers to find their way back to the home row. F has that little nubbin on it.
I used to think it was a jerk move to talk about mouse superiority over a controller back when i played halo. then i started playing csgo. and yeah… mouse is objectively an upgrade.
carpal tunnel is pretty idiopathic, but RSI due to mousing can be troubleshooted(…) imo. way you hold the mouse, size/shape of mouse, height of your desk, height of your chair, etc. but heck i’m not a doctor, or ergo expert.