i'm sorry but banshees are just plain overpowered (i'm a platinum protoss.)
so, ok. They do insane damage to ground units and buildings.
They attack in packs of more than 3-4 normally.
They kill stalkers easily.
They kill cannons easily.
They can CLOAK
Stick 1 raven in the mix, they snipe your observer.
They totally screw your economy.
The terran player just sits back and turtles, techs up to battlecruisers, while you are pinned down running to and from your expansions and main defending against these banshees.
you are forced to build lots of cannons (150 minerals each) or lots of observers (100 minerals/100 gas) and even with observers, the banshees can just see the cloaked outline, and attack somewhere else.
If you want observer speed to follow the banshees, you need to build a robotics bay (200 minerals / 200 gas) and get observer speed (I think 150 minerals/150 gas).
When you have a robo bay, you wanna be getting thermal lance for your collosi, not ****ing observer speed!
And how the hell are you supposed to afford any of this, when they are happily weaving in and out sniping probes?
And finally, if somehow you survive the banshee attack, you have a fleet of 30 battlecruisers knocking on your front door 30 seconds later.
It's just ****ing ridiculous, Sure I might not be WhiteRa, but still, every game I play against a terran, I can't go stargates or templars first, I ALWAYS have to go robotics because of the ****ing banshee harrass.
WHAT DO I DO?
P.S: Please don't call me a noob, i'm really not. if I don't see a banshee, I hardly ever lose to Terran. I similarly win most games against zerg and protoss, and my win/loss ratio is close to 2:1.