Yes, Tank Fizz is a problem.
But can we stop pretending the problem its (the already inefficient and nerfed) tank itemization and not this bullshit anti-tank tool in an assassin :
https://67.media.tumblr.com/3c1c2ee4aef32e40fd9a0d445de2cc09/tumblr_inline_o86b4bHW501rubw0r_540.png
Seriously, why does an assassin have an anti tank tool?
The worse thing is that people are trying to make believe that IBG and Sunfire are the problem when they are balanced in the champions that are supposed to build them?