I think everyone complaining about Annie should go play DotA2.
Not in a 'get out of my game!' way, but just as a learning exercise. Are you finding that you get wrecked in teamfights by flash Annie ult? Then go play against Magnus or Enigma. You will learn, very quickly, how to avoid clumping up. They have longer AoE stuns, and with blink dagger, they can do it every time their stun is up, not just every time their stun is up and flash is up.
No, you can't always survive a 1v1 if she burns flash, but she no longer has flash for the next couple of minutes, so get your jungler to gank, or just get really aggressive and rely on your flash to save you.