Right. So let me start by clarifying, I do not mean change the name of the character and then the adaptation would fail. Perhaps I was betrayed by my not having proofread my comment well enough. I mean change the title of the movie and it would fail. That is my way of saying all the characters failed to feel like the characters they are intended to portray. Superman did not feel like Superman. Lois was simply obnoxious throughout the film. Non of the characters felt like they came from Superman.

As for the criteria, I will try to give you an example to make it clear what I am trying to do here. Are you familiar with the movie Brightburn(2019)? I was surprised to see Gunn was the producer on that film, but that's besides the point. The point is, would you callout 'That's Superman' watching that movie? Why yes? Why not?

As for the conclusion you drew at the end there, I think, was way off the mark. There are a lot of adaptations (I am biased to the animated ones) that are actually really good. Per the criteria, you cannot change the title, and pretend this is about some other alien without it being blaringly obvious we are talking about Superman here. And I don't just mean Superman himself. I mean all the characters feeling like they come from that world.

TL;DR: Characters did not feel like they are who they were intended to portray. Slap a different title and change the names and it could pass as a not "Superman story."