Let me guess, the writer is a white guy, 20-37 years old? I'm guessing this because most annoying, overly opinionated, arrogant writers/personalities that come off this way ARE. LOL While I agree with some of the points made, the whole tone of it is annoying and off.
The truth is, Happyness is probably the last FP movie that I truly enjoyed. I like MIB3 and Seven Pounds. I grew to like Legend (other than the end), but the magic of his movies has fizzled. Granted, I don't care about them much. I'm all about the music, but USUALLY I hyped up when they drop and enjoy them. And I STILL haven't seen After Earth. I'm just busy, and this isn't Bad Boys, Hitch, or MIB. I will in the next couple of days.
I think the bottom line is this, there is a time to produce and have creative control over your movies, and time to let it go. He's not going to grow if he isn't challenged, stirred up, and stretched. COLLABORATING is key in movies, TV, and theater. If he fails to collaborate and let some control go, I could see things staying like this. The same goes for his kids career; have involvement TO A POINT. I have to say that I don't like Tarantino at all. I've watched Pulp Fiction through and pieces of a few of his other movies and for the most part, I hated them. They have a specific taste for a specific kind of person.
Not every movie can be a hit. He's had lack luster success before. People are just making a big deal of it this time. They still love him though. He'll always have that on his side and that's why reactions like this are just a flash in the pan.