my guide:
Step 1: Get a better graphic card
Step 2: Get a better processor
Step 3: Get more RAM
Step 4: Get a better internet provider and contract
Secret step: Get a better computer that actually has a fucking graphic card, not a useless intel HD graphics or whatever that stupid name is
Step 5: Get a better mouse (Razor series is way to go)
Step 6: Get a fucking mouse pad (gaming one)
Step 7: Turn off HDR
Step 8: Get modification for skins (ct's are blue, T's are red)
Step 9: Make sure to check if your fps is over 60.
Step 10: just fucking play as much as you can. (man up and stop complaining about mouse sensitivity)