Because unlike other Pokemon when they pulled new moves from nowhere, they didn't just get an insta-win; they still had to fight their way to victory. When Squirtle
learned Hydro Pump, when Noctowl
learned Confusion, or when Buizel
learned Water Pulse, they didn't just plow through their opponents until they were KO'ed, they still had to put in some effort to win. With Axew, as soon as he learned Outrage, he just effortlessly pummels Golett
with no struggle and without Iris giving the command, as I already mentioned. Another reason why that was an undeserving win: Iris did not actually win that battle; Axew, and Axew alone
, did that. Instead, Iris just stands there watching Axew pound Golett while commenting on what he's doing without doing her job as Axew's trainer.