I've learned that two spies working closely in tandem can be devastating for engineers, as well as the fact that if an engineer is alone with his turret while you're a spy, there's NO way the turret will stay alive if you know to repeatedly place your sapper on it.
-and yes, while getting frustrated when you have a team that has a collective IQ of a flea in heat is very common, the best thing to do is take a step back and think strategically. Despite what many of the newer people think, this game definitely ain't a straight shooter.









