I would realy love for a Riot balance team member to tell me how poppy is balanced
Just played a game VS a poppy, she went full tank build

Poppy did the most damage doing 37k and also took the most damage with 25k physical and 8k magic damage totaling 33k damage taken.
Nobody could kill her, she also did more damage 1v1. Has a shield, an E that doesn't allow you to dash or hop which is like 99% of the champions AND just in case you are close to killing her she has a disengaging ult.
Sleeper OP champion
while constantly staying near walls and letting Poppy do whatever she wants unpunished".
exist and you need to consider tank-buster items much earlier than usual. (Note: Blade of the Ruined King on its own with no armor pen is not much of a tank-buster item.)