There were several really bad design decisions made around unlocking the ending. Primarily the fact that Rocksteady thought it was wise to lock the ending.
English
-
See I wouldn't mind but the game literally gives you no hint or clue that if you don't talk in Azreal then Riddler is your only choice. It's kinda cheap to make ppl play longer don't get me wrong it's a great game and well worth playing but I'm sure I'm not alone in having no actual interest in the riddles :/