I think that is totally unfair.
He got to the final on his own merit, he battled through the heats along with all the others and won each one with his wonderful pudding.
Of course all 3 deserved to win, that's why they were there at the final, but without actually tasting the dish you cannot judge by looks alone. All the recipes were superb.
I am very glad he won, there are not many 14 year olds who can cook anything, let alone cook a souffle, I know many chefs who crumble at the thought of making one.
Credit where credit is due, it was the audience who were finally deciding and it could have come down to only a few votes between them all.
You are being sucked in by clever editing to look like some other dish had won. Just because it wasn't your favourite that won, doesn't make it an undeserved win by an extremely talented young lad.