You found it too easy?
You play against other people, not the computer. So just play better people.
Whatever, I ain't got no 1.6, so the skill level will be raised about 70,000% by my absense. My CS skill is at the 'Crap, is that guy wearing stripy trousers or not? I can shoot him if they're stripy, right? No? Green trousers! And I'm dead.' level.