Launch options are only half the battle. Once you’ve set your launch options and opened the game, you should adjust your in the console ( ~ ) to ensure you aren't lagging on servers: rate 100000 cl_updaterate 102 cl_cmdrate 105 ex_interp 0.01
You can also use the launch options box to execute console commands (prefixed with + ) or custom config files: cs 16 steam launch options install
If you're still playing the GOAT of shooters, you need these launch options to fix mouse lag, boost FPS, and get that classic 100fps feel. Launch options are only half the battle
+fps_max 101 : Sets the maximum frames per second (101 is the standard for 1.6). cs 16 steam launch options install