It requires specific kinds of board state: your opponent must have a board youre able to bounce, you need a creature big enough to bounce all of their important creatures, and you need to have sufficient resources to take advantage of trading card advantage for tempo (which runs counter to how almost every other Exploit card works)
If they open a Brain Freeze, they can safely assume theres a draftable blue storm deck
You wont make many friends if you cast an Armageddon, since not only are you denying players resources, something no one likes, but youll likely be dragging the game out for a long, long time while players try to rebuild their board.
In fact, I havent had a Temur deck since my run-in with Animar, Soul of Elements in 2017
Combining great stories, fun tactics, and surprisingly complex ideas, there is a reason why this is one of the most popular games in the world