I mean you can say fizz is broken but let's brake it down more as a whole and less as you view it.
You are 2-11-5 at 30 minutes which leads me to believe that fizz was fairly fed. You have 95 cs at 30 minutes which means you have no gold And this leads to problem 3, you built a roa and a ludens neither have mr and neither really stop fizz from killing you. His whole ult into 30% damage increase into no mr no mobility no qss is a huge recipe for death.
Instead try this, build a abysal into maybe a hour glass or hell as malzahard get a qss. Cleanse ult push your 1 button and stop coming to forums saying "x" is broken. When you yourself did nothing to play around "x" and now your left asking yourself "why"
Yeah, that window is bloody tiny, it's what all the complaints are about.
Fizz is disgusting, his jump should not make him invulnerable ( it should be like khazix/tristana jump). Hes an assasin with invulnerability on a very low cooldown, that is just toxic. (especially when combined with a zhonya = jump/zhonya/jump).
Fizz invulnrable, until he lands...
make him like zed, increase e range to 1500, (doubled with r) and instead of reactivating to target, he teleports back to start, that is what people consider fair right?