I share most of these experiences. I worked for VGChartz between 2007 and 2009 and that got me some insights into the video gaming industry. Back then this site was really big (the New York Times would quote our numbers, we had an interview with Reggie who said he regularly looked at the site, I wrote a monthly article for the biggest german Nintendo magazine) so we could exchange opinions with some pretty big figures in the industry (among my personal favorites were Sean Malstrom who's blog was simply brilliant back then and Michael Pachter).
My experience was this: Even back in 2007-2008 the gaming industry simply did not want Nintendo to succeed. The gaming press continually trashed "casual gamers". Industry analysts and 3rd parties did the very same thing. We constantly heard that "the Wii bubble is about to burst" and here's the thing: The Wii success was based on Clayton Christensen's theory of disruptive technology (which I always try to advocate here but nobody listens). Nintendo's success was not a surprise, it was not a coincidence: It was based heavily on well backed up theory, based on the work that also made Steve Jobs successful at Apple. And everyone could have read through this work in a matter of a few weeks - but they didn't.
Gaming journalism is just bad most of the times so maybe it was to be expected that these people wouldn't pick up on Nintendo's "secret of success" but here's the thing: Nintendo constantly went on and on about disruption (Wii) and Blue Ocean strategy (DS) being their strategies of choice and still nobody listened to them or gave this any coverage. Now gaming journalism may just be lazy - but companies like EA, Ubisoft, Acitvison and analysts like Pachter who make their money accurately predicting market trends? No way in hell. So lots of third party publishers gave the Wii token support just to appease their investors - and because they didn't really want Nintendo to be successful ("only Nintendo games sell on Nintendo consoles") I can only assume at least some of them consciously didn't put any effort into their games so they could show their investors the numbers and say "Look! It doesn't sell on that platform!"
My point is: This whole story of "stupid casual gamers" (or the phrase that "Wii didn't have any hardcore games") didn't start in message forums. It was part of the industry speech back when Nintendo was successful and was constantly re-iterated. It was part of a marketing machine. I think Nintendo will be in a very bad position if NX fails (which is a possibility) but yeah: Your experience is not just a personal one. It's sort of a revers marketing slogan.