Something that's grown out of my previous thoughts on the company's use of the DK franchise is that I think there's more of a complexity in the relationship between Nintendo and its fans that gets lost in the emotional charged online sphere that often charges the former to be clueless/out of touch and the latter toxic or entitled. Truth be told, I believe the root of many of the controversies is a disconnect between the company's philosophy on games vs that of the fans, and one where neither side is entirely wrong.
How active an IP should be is a major example of this; Nintendo has often demonstrated a willingness to keep ones in hibernation until they deem the next entry worthy of being developed, often with a new concept or core idea that can make it stand out. There is a clear practical logic to this; avoiding excess burnout at the developer end and the sort of franchise fatigue that's hurt so many formerly popular series. The NSMB titles could even be argued as an exception that proves the rule, as getting four of those games in six years led to diminishing returns with the latter two entries and arguably created a backlash against 2D platformers for a while that potentially hurt the interest in something like Tropical Freeze.
Nonetheless, from the player's perspective, this is often seen as not only disappointing given the love for the franchise they have, but also seen as a move that might end up hurting it because of the lack of momentum and spotlight. And when various other series are getting more frequent entries, over time the lack of sequels is not seen as an act of care, just disinterest by the company itself. While it's easy to say fans are merely impatient, without any definitive news about future entries (or in some cases not even having its content appear in spin-offs) unhappiness bordering on antipathy is practically an inevitability.
The same thing applies a bit with the experiments that started taking place in the GC era and then really took off circa 2006-2016. In a lot of ways, I think the intentions were good. Nintendo wanted to stand out again, and given the leaning on first party entries that became necessary in that time, making them fresh experiences had value as an idea. Long term, it's likely invigorated some internal development teams and helped birth new properties like Splatoon that have taken the world by storm. However, the lack of choice in how much novel input one wished to partake in (waggle being mandatory in DKC Returns to name an example), and some games feeling like they prioritized the gimmick over the core gameplay justifiably led to an eventual backlash.
Basically, while there are times Nintendo can needlessly stick to certain ideas because they're a somewhat stubbornly conservative company and many occasions where excess fan expectation can become actively harmful, I think more often than not both sides are coming from a decent place and simply disagree on what is most beneficial for certain series.