LeBlanc comes to mind. Jump right over the ball, vomit damage in her face, and by the time she commands the ball to come back to protect her you've already poofed back to where you were.
Eve can counter her pretty well so long as you get the drop on her. It's fun jumping her when her ball is deployed far away in the opposite direction. Not to mention hate spike makes it easy to avoid the ball.
Fizz also counters her hardcore for the same reasons as LB. Jump over her ball toss, mangle her.
So, essentially, anyone who can jump past the ball easily or go around it and then make a quick exit. --- It's easy to claim that a thing is self-evident when you've already convinced yourself that it is.