Mana Leak is also a better anti-combo card than a dorky hatebear.
It's really not.
Especially when the combo decks are playing their own counters and/or Silence/Abeyance/Chant.
It may be a more versatile card or better against other decks - I'll give you that - but the Mage is just oppressive against a deck that relies on a particular combo in a format where your opponent has your information.
Be as sceptical as you want, but - as
someone who has experience with the format - I can assure you that MM can often just shut an opponent down.
So what happens when the opponent with that exact same suite of countermagic and burn just counters your hatebear? It's the exact same situation.
Well, they'll have to counter the Mage when I want to play it instead of waiting until they're ready to go off and, additionaly, the Mage is significantly harder to counter than Leak in a deck running 4 Caverns.
Also, casting Silence on me every turn that I have 2+ mana until they go off to protect from Mage is probably much more difficult than just casting it the turn they want to go off to protect from Mana Leak.
Finally, I don't know of a single Combo deck that "protects" its combo with burn or removal, so I'm not really sure how to answer that one...
Suggest to ban Goyf in modern: get a smart, well thought out post about why it shouldn't be.
I need to go deeper........
A real troll wouldn't let a little sound logic stop him.