This could be anything from not being a good pilot or not knowing how to maneuver against a certain ship, or not remembering your pilots abilities.
So what's your Kryptonite?
I have a few I've been trying to get better at. And some that I have no control over.
1. Fire Control System. Whenever I see this on my opponents ship I cringe. It puts me in a start of mind where I feel like it won't matter how well I roll evade dice.
2. Soontir Fel. I've been a fan of this character since the old Decipher CCG game. I was ecstatic when they introduced him to X-Wing. And I've won many games with him. I just can't beat him.
3. Poor dice rolling. I really feel like i dont roll dice very well. I could have 5 attack with a Tie Phantom and only ever roll one hit. Consistently. I do end up winning more often than not, I think, but it's time like that that make you sick to your stomach.