Zed has no weaknesses.

Teamfighting.

Unless he's ridiculously fed he won't stand a chance of blowing up your ADC if your support is sitting on his dick. Just save your Exhaust for his ult, throw a CC to make him go back to his ult and then he's not that useful anymore. Believe it or not, he's fucking squishy and late game as an team you can blow him up easily. And if he's still murdering you without ult chances are he's got a huge item advantage and it wouldn't fucking matter if it was Zed or .

Also learn to abuse his W's cooldown, no one maxes it first and it's almost a 20 second cooldown. People learn to exploit Blitzcrank's hook cooldown so why can't they learn this?

Sometimes if you struggle against a champion you should play it a bit yourself then you learn what your opponent is trying to do. You may find a good Zed is harder to play then you think, hence why Fakers aren't running around NA Solo Queue..

Remember if you are facing a Zed, the chances of winning are statistically higher then if you have a Zed on your team.