OK.. Now that Ash, the main character since the beginning, has not won again.. I can honestly say that I hope the show cancels.. Worst idea ever to not have him win.
As Weedle said, the Kalos saga has been probably the worst-rated saga in Pokemon history, at least in Japan so it is making me feel worried if the eventual Alola saga will rate even worse. I just believe the writers have a thing against allowing Ash to win a league in a major region that appears in the games - he did win both Orange Islands and Battle Frontier but they were not considered "main" so they let those be exceptions.
Now I do hope Ash outright declares he doesn't want to be a Pokemon Master anymore since he feels his Pokemon are better than just chasing a title.