Agree with others here who say this game is not about the ending, but it certainly was a let down. I thought the "true" ending (beat all divine beasts and/or recover all memories, not sure which) was just passable. The..."not true" ending was disappointing.
This is partially the cost of doing a non-linear game, there won't be a big in-depth story, but it seems like there were missed opportunities here. I'd like to see the so-called "true ending" as the regular ending and then the new "good" ending could show the progress made a year later at Hyrule Castle Town or something like that. I don't need anything complex.