Fizz's "Troll Poll" is too long and too OP

Ok I get it he can't be targeted while on troll poll, but A. it lasts way to long for a champion that is primarily burst damage. We can kill off his entire team but survive and they still get and ace. B. Also from a consistency perspective, why is that more indestructible than Braum's Door?

I suggest making it similar to the door where the first hit/ability is negated. but he gets knocked off so it cuts the the amount of time that it lasts while still having the impenetrability that god forsaken fizz mains love. Is this something that is A. mechanically feasible and B. do you think there is a better way without nerfing to the bone to make this functional. Becuase in the end I dont want that. I still think a good fizz main should be a force to be reckoned with, but it should be a YES I GOT HIM, instead of a "I think i got him, nope wait, he just got a triple kill." from an opposing team if you know what i mean.