Their tongue out emoji (which I use quite frequently) looks ridiculous. Pretty much every emoji set has a neutral looking face with the tongue out, indicating a very slight amount of unseriousness. Meanwhile the Teams one has big anime-esque smiling eyes that looks straight up goofy.

Also their thumbs up has such a fat hand you can barely tell it's a hand or where the fingers are.

But yes, far from the biggest issues with this stupid app.