Well, that's certainly an unpopular opinion, though I don't think in the way this board intended. Let's break it down.
The quality of the games are getting worse because our community isn't vocal enough about the recent flaws. Scrapped kalos, rushed alola, underdeveloped characters, never a post game, ect.
Now that's a loaded statement.
I wouldn't say the games are getting worse, but rather they're getting more casual. GF had evolved the game so that it's target audience, children, can play through the main game without getting too frustrated, giving up, and move onto the dozens upon dozens of other games that's available to them. And because they're not staying around after the main game, it probably feels like a waste of time to add in any major game content that adds more difficulty/complexity other than the Pokemon Tower expy. It's probably why XY, ORAS, SM, and USUM are providing a post game story episode or mission quests to keep the casual audience with the game a little while longer until all there is left is to do the Battle Tower expy and battle competitions which they aren't interested in.
Not being vocal enough? Hi, despite having posted over a hundred messages on these forums, let me be the first to welcome you to Smogon! Our hobbies include dictating competitive battling rules, complaining when the next Pokemon games news is coming out, and thinking we know better than the developers of the game! Oh, Pokemon fans are vocal about what we like and don't like, GF just doesn't care. And not because they're jerks or anything, it's just that they constantly want to do something new and focus on those new mechanics. They may also want to give each generation its own unique feeling, and that means having certain mechanics be left behind no matter how popular it was (also giving them something to go back to if they decide to do a remake/revisit). And to be fair, GF hasn't completely not listened, they're constantly adding in quality of life features making getting and raising your perfect team more and more easier... though it does feel like baby steps most of the time but steps in the right direction at least.
Lightning Round:
Scrapped Kalos: 20th Anniversary somehow snuck on them and they had a choice: release a third version which wouldn't sell that much and be limited to what XY had to offer OR release an entire new generation that will sell better, has updated graphics, new Pokemon and mechanics, and use it to celebrate the 20th Anniversary without being limited to what a previous game had.
Rushed Alola: This also probably meant development of the next games had to be cut short. Though Alola is at least getting a second pair of games to expand upon what it had... though with Nintendo rushing them to move onto the Switch there's still probably some rushing going on not just for USUM but also the Switch game.
Underdeveloped Characters: Any specifically? I find that many of the Alola characters had quite notable characteristics for what role they had in the game. Not everyone can get a story arc that spans through the entire game, some just need to make do with the time given to them and I felt most did a satisfactory job.
I'm not looking forward to the switch because if they keep doing what they did with the 3Ds titles it's not only going to below people's expectations, with forced characters and a Faceroll of a plot, paying 60 dollars for that is not going to be acceptable anymore imo.
Pokemon games are usually $45. Correct me if I'm wrong, but has there ever been a full price Pokemon title?
EDIT: I didn't know Nintendo games prices are based on console and not individual franchises. Though to justify a $60 all they'd need to do is provide high definition graphics (which modders have already done, hopefully GF will also put the budget toward giving each Pokemon more unique animations while idle in battle or in Pokemon Refresh).
Let's first see what they're even doing for the Switch game before decrying it. Yes, they're probably now in a rush to make it and development is in full throttle, but that doesn't necessarily mean it won't be a fulfilling experience. Though I would say after the initial paired Switch games would be when the quality of the games should start to wow us as they shouldn't have to rush any more. Be this for the second pair of Gen VIII or Sinnoh remakes.
Game reviewers shouldn't keep giving bare bones reviews about the "story" and never going deep enough to actually give the games valid critism. Besides "too much water" which probably made them even more wary of ever giving the games a bad score.
Game reviews are a hard thing as the reviewer has to give their opinion of the game, what they liked, what they didn't like, problems they had, and finally if they recommend it or not. In addition to that they have to keep away from spoilers and do this all within a word/text limit because people reading the review just want to know if the game is good or not.
I think who you want is a game critic, someone who specifically digs into a game, finds its faults, and point them all out with indepth analysis and maybe suggestions from them or the community. Now Smogon is pretty much an entire thread of Pokemon game critics, but our criticism mean little if GF ain't listening or listening only for what they're willing to change.