Blomkamp may have been cheeky to do what he did (I think so), and perhaps that makes him an arsehole. But the film isn't being canned for that reason, if it was going to be good for Fox it wouldn't matter. That's how it got as far as it did.
Lots of people, Scott, Blomkamp, being blamed for this.
It's Fox. Making a commercial decision. The rest is tittle tattle and irrelevant.