Before you make any posts about "POPPY OP!", consider this counterpick

I'll leave you to figure out why he dominates our hammer Yordle.

I'll leave you to figure out why he dominates our hammer Yordle.
So, why does he dominate our hammer Yordle? And why would she be balanced by having one boring counter?
Ragnarok makes Olaf immune to Poppy's peel, while Reckless Swing cuts right through her resistances. He can also trade favorably in lane with her using Undertow and Vicious Strikes.
And she has more counters than just Olaf; I'm just citing him as one way you can counterpick her.
Who doesn't Olaf dumpster in melee range early-mid 'cept maybe Renekton?
His E does true damage, and his R ignores her R and e wall stun.. not too impressive as olaf is a counter to almost ALL champions with heavy cc and build armor..
Besides, a smart
will be able to dance around a smart
with her Q.
Singed?
You forgot a bunch of other counterpicks:

I listed Olaf because he's able to ignore Poppy's peel attempts, while the ones you cited above don't become immune to Poppy's ult or charge.
I listed Olaf because he's able to ignore Poppy's peel attempts, while the ones you cited above don't become immune to Poppy's ult or charge.
Fiora's parry?
Darius into poppy is really awful for poppy. Poppy has no way of dealing with darius or even farming safely against him. She either dies or sits under her turret all game. It's that bad.