Is there a way to counter the computer's
"You're Screwed" combos? Or do you just have to sit there
and be juggled through the air, taking it?

If you are in the air: you are screwed. Your only hope is to counter the move that would have made you airborne.

It rages me so much when your owning up on the comp then they do a counter and get you in the air... Then its just jab jab jab on your toe which amazingly keeps you airborne while they finish thier 11hit combo and kill you! God and the last boss, freaking disapears whenever you attack then does some huge combo! I just wait for her now and do power hits when she gets close, never lost to her again lol.