Lyxen
Great Old One
D&D is a product that has the luxury of having a brand that's bigger than the medium or market it's in.
And what you are failing to recognise is that they had to really conquer this brand from the ground up after the commercial disaster that was 4e. It might be true that, today, 5e is living well on its brand recognition, but it would not have gotten where it is not if it had not been an excellent game well suited to a player base the size of which no-one could ever have suspected 7 years ago.
There is no product out there that grows that powerfully without being an excellent product, well suited to its consumer base.
You might not be part of the main target because your tastes are different, and that's absolutely fine. But not only is the product flexible enough that you can adapt it to your need and enjoy it (at least I hope, if you are debating here), but it clearly shows that there are millions of people who enjoy it as well using this flexibility, for its own intrinsic qualities in addition to its brand.
It's been 7 years since 5E released. It's been 4 or 5 years since most of the new TTRPG players around me starting playing it. And just now do I start seeing some dissatisfaction with what the game is and some interest in other games. People start to see the cracks and want to try something else. And as players, they're much better equipped now, after years of experience, to explain why they're going dissatisfied with it. The game's own value and quality has not changed, but like any product, with time you start to see its flaws.
Maybe, but maybe it's just simple lassitude and want to see something else ? Maybe it's lack of attention span, which is common these days, lots of people want instant satisfaction, or maybe it's just that they were dragged into it and were not really into it that much. Who knows, there are millions of players out there, and I don't think that the view of the people around you has any significance statistically compared to the size of the player base.
As far as I know, the PH sales are still going strong, for example, which means that new players are joining in, and I have personally initiated at least 10 new players in the last 2 years, despite the Covid.
It's a game with infinite flexibility, that I have been playing in one form or another for 40+ years, and I still find new plots and new characters to play after all that time. And again, if some areas are not fine for you, you can change them instantly, god knows that there are tons of suggestions out there as to how to do this...