Because the strongest warrior in the current meta won this legendary card: Boomboss Tho’grun. While the mage got this legendary crap: Mes’Adune the Fractured.
Why??
It will be beautiful to see the mage’s suffering face when he faces the warrior and sees that the T.N.T. destroyed your Sif in the deck or new hero from neutral.
Why did the mage receive these stupid legendary cards??
Why??
Because these developers have no idea about what they are doing anymore… Aggro is broken, control is broken, and OTK still exist… Playing Sponge Bob Square pants platform game is bigger fun now then Hearthstone… 
It continues with their opponent cheating mechanic which can affect your hand and your deck. These are our cards, not the opponent’s, so he has no right to touch our hand and deck.
Boomboss Tho’grun > 3 minions on the destroyed board, 3 cards in hand and 3 cards in the deck, 6 cards destroyed in total + 3 minions on the board (completely stupid).
When you play against a warrior, he will play a deck of 30 cards while you play 24 cards (because of boomboss thogrun), where is the balance? It’s an unfair mechanism that must be delected.