Had Ash lost in a legitimate way, Kanto would really be high.
However the Ritchie battle just totally ruins whatever good the Kanto league.
It was like a balloon, it was filling up with air, then some sharp pointy object (Ritchie), popped the balloon, that's how I feel about the Kanto League. Ritchie completely and utterly ruined that league for me.
Everything but Ash vs Stephan ruined the Unova League, so at least Kanto has that over Unova.