Lot of people dont get game sense of this game...
1.This game is about :CT side which need to kill all 5 T or Defuse bomb when bomb is planted you need to get to site asap and not straight rush so you can defuse your have time to kill and think,you need to see where is bomb planted and by that predict where your enemy players are you will get that.
2.When youre playing T is all about getting to the site and planting and killing ct trying to retake.It is not easy but always play time dont push ct wait till they push you then take the fight you will win fight or lose but atleast you tried...
3.When you die always say info and hp by that your teammates are gonna win round 50%+...

Not best guide but for people that need it its good...
Before playing this game go buy antidepressive