You might want to watch this
. He expresses his POV a little more explicitly and indepth than what you can gather from a random tweet.
I'm not saying I agree with everything the guy says, but I think his basic argument that the extreme backlash and sense of entitlement can only hurt the medium in the long run is a fair one. The real reason he's getting blasted is because a lot of people on the internet are kneejerk reactionaries who think he's saying "everyone who didn't like the ending are crybabies." He's not. He's saying the crybabies are being crybabies and that it not helpful to a medium currently struggling to be taken seriously.