We need to have a discussion about damage
Too much damage is in the game. Regularly being completely 1 shot by tanks is not fun at all. Being 1 shot at all isn't fun at all, especially by someone you don't expect.
I can understand someone like Veigar being able to one shot or Akali, but Garen should not be able to one shot. Nautilus is sometimes able to 1 shot. Even if you're a tank, there's so much penetration in the game that the ADC can clip down armored champions like they're a level 3 Janna.
Not very fun.