Poppy at full build can have almost 550 armour and 225 magic resist.
"clearly her ult and shield are the problem, lets nerf that" - Riot 2017.

Not including runes, masteries or base stats. If poppy is below 40% hp she has with that build 435.5 armour and 130 MR.
get fed before.
is really good in those situations.
who is now at late-game build doing a couple 1000 damage per second to you.