When you say "it's played in like 2 formats" do you mean Storm or Flusterstorm?
Regardless, Flusterstorm is blue, which doesn't solve the problem
Blue tempo decks already have enough ways to deal with Storm by countering the enablers while applying strong pressure, though of course good Storm decks put up a fight (ANT, TES) and bad Storm decks roll over (Belcher, SI). Cards that "stop" Storm already exist (Mindbreak Trap, Rule of Law, Ethersworn Canonist, etc.); they don't actually solve the underlying problem though, which is why they don't work.
The issue is that "fair decks", including slower blue control decks and things like Loam or Junk, tend to be very soft to Storm because they like playing longer, durdlier games and lack either the means to interact with the Storm player or the clock to make that interaction relevant. "Fair aggro" decks like Zoo are also in this position; they are fast but not nearly as fast as Storm combo, so they can't race, yet racing is really their only option. Often you have to put so much work into your sideboard to get it prepared for Storm decks that you lose a lot of flexibility on anything else (or gimp your own clock), and you still having a bad game one win%.
Storm is an inherently non-interactive deck because it likes to operate entirely on chaining instants and sorceries on the stack. And the way the color pie is designed, this inherently limits most colors' options in dealing with it. Hate bears and hate enchantments have never worked well at dealing with Storm, even after years of printing different and varied hate bears. They are way too easy to just sculpt around and go off, they are a little slow, and they are often super narrow and don't do much else. The only really strong ones are ones like Thalia which throttle the entire stack.
"
