I don't understand how people still think this is a thing. Her tank build was overhyped to begin with and it's just gotten worse and worse as time progressed. Tank Akali provides literally nothing to her team except for mediocre damage and a slow.
Tank Ekko and Fizz worked because they did a ton of damage with their %health damage which allowed them to build really tanky without losing out on much damage and, on top of that, provided a lot of utility to their team. If Akali doesn't build damage, then she doesn't do damage. An Akali that doesn't do damage is useless to her team.
If you are losing to a tank Akali she is either miles ahead of everyone else in the game or you're just incredibly bad at this game. It's astounding how many people still think tank Akali works.