The gaming press is made up entirely of the most hardcore of hardcore gamers, and so for the past bunch of years they've been holding this "nintendo has betrayed us" grudge. Not to say they're malicious towards nintendo, but there's no benefit of the doubt giving. Go back and listen to big podcasts around when Super Mario Galaxy 2 came out. The discussion was always "yeah it's good, but it really doesn't need to be on wii and it's mostly just a level pack for galaxy." It was much harder for good wii games to get press time because the press was too busy making jokes about how the wii collected dust (and this was years before the will was actually dead).
Also, from jump it was the "third party games don't sell on nintendo consoles" party. So something stupid like "Mad World" would come out, and instead of people recognizing that this particular game wouldn't have sold on ANY console it became a victim of third party wii game syndrome. I'm sorry, what box retail black and white ultra violent weird Japanese games have become million sellers on Xbox? Like, no one said that stupid Suda 51 game with the dick jokes didn't sell because it was on Xbox. It didn't sell because no one was interested in playing that.
Game writing is a victim of being super insular. It's exactly like comic book writing. Everyone knows each other, everyone has worked at every site/magazine and all view games in pretty much the exact same light. So there was never going to be someone or a group of people who were going to buck the trend when covering Nintendo.