it was actually decent in my opinion. the only thing they don't like about it is that "it wasn't accurate to games" but mind you- AT THAT TIME mario was nothin but a pixel man jumping over blocks and enemies, there was nothing to be accurate to.
this is my /srs opinion: that other minecraft promotional material is too undetailed to be a whole cinema movie, I think it should have been like a combination of minecraft story mode and those promotional material you talk about.
I dont really think minecraft story mode is bad, I never played it but anyone who doesn't like it just says "it's not like a game it barely has any gameplay" but I played another telltale game (the walking dead) and its very good, it just focuses on story and drama more than gameplay
honestly combining live action and animation by adding actual people in animation for the minecraft movie is a stupid idea; the whole thing should've been live action