AP Tanks are way too strong.
We have
running around "outplaying" your adc with
+
+R
We have
being able to 100-0 squishies with one AP item, while also having literally everything someone could want in their kit (tankiness, cc, mobility, damage)
We have
.. y'know what.. im not even talking about Zac
Lets not forget
locking your entire team down for 2 seconds while also doing 400+ DPS to everyone with

Honorable mentions:

But yknow, assassins op, nerf caitlyn. So lets not talk about Tanks being a problem, alright?
goes unnoticed despite being top 3 tank