About LOTR: people were complaining. Although I can understand their reasons to do so, I wasn't. I was sure Peter Jackson would do a great job. Tom Bombadil was a smart cut. As well as the way he exchanged some lines among the characters.
As I said, sometimes, genius intervenes (and I hope that's the case with Snyder).
I think the problem about the rest is what follows:
I haven't said anything that would lead one to think I can't accept adaptation. It's pretty obvious that when you have two different media, adaptation is necessary and NOT a problem.
That's the first thing, I suppose.
And people do complain. Everyone who read the Iliad smashed that crap called Troy, for instance.
See: not because it is an adaptation, but because it debased the source material beyond recognition.