That's not denial though. It is very likely Ash would have lost if Iris had not used her magic dragon thingy to encourage his Dragonite.Dracovish still threw her and her Dragonite's pace off due to her not knowing about it, and despite this she did NOT see Draco Meteor coming until it was too late.
I knew some people would be in denial of Iris losing but not to this extreme.
As you can tell, his Dragonite was not doing so well at all before that.
Like Ash won, sure, but the Dragonite victory is largely thanks to Iris stepping in.