What do you expect? Valve doesn't release ANY first-person game at all for almost 6 years and the first new thing they DO release is a card-game based off of Dota 2. Of course people will grab their pitchforks.Community is reacting extremly negative.
I feel like the backlash is because people who don't even play dota are flaming about it because "Valve isn't making HL3 or L4D2" though that was a project done by the DotA 2 devs, and if they want to make a card game... why not? But people act like this card game is the reason why we aren't geting a new shooter from Valve.
Also, what a waste to have such a distinct logo on what is essentially Hearthstone Lite.