User blog comment:The Milkman/Madness and Genius/@comment-2076032-20121209105806/@comment-24174486-20121209183201

One has to have played the entire game to know how the ending fits in with the rest of the game. For example, if one only watches the last ten minutes, they can't say something like "THERE'S NO FORESHADOWING COMES OUT OF COMPLETELY NOWHERE!" based on what they've seen of it (not that such criticism is even accurate).

It's exactly why people complain about "the last ten minutes"—because their attacks on the ending fall apart when you acknowledge things that happen in the rest of the game.