Exactly.
They'd do the same if it was One Piece earning the ratings, and you guys wouldn't consider it a bad thing.
Things feel different across the different fandoms, eh? And it's never a good thing unless it's THEIR favorite show receiving that treatment. Which in that case it'd be great!
That's how people think.
Well if CN was advertising One Piece as much as they do Naruto. Which they pretty much don't. Then I'd be inclined to agree with you that it's just a question of fandom opinion.
As far as I can see CN just loves to suck Naruto's dick while ignoring anything that isn't Naruto.