They've been phoning their games in since the WiiU era anyway.
The last real Nintendo release I felt was original and packed with content was 3D World.
Everything since feels like they let interns design things en-masse and half bake most of their releases. Zelda and Mario get sandboxes, one 2D release in years, and remakes. There's Metroid Prime 4, but... if we're being real, it should've come out half a decade ago, not to mention tossing Gamefreak the BOTW engine and apparently not helping, at all with recent Pokemon games if the bugs are anything to go by, Smash netcode issues and not being taken seriously as a competitive sport, gatekeeping their classics behind worse in-house emulators than what you get for free on GitHub, you could write a book.
It’s fair to hate Nintendo, but “phoning it in” when we got BoTW, TotK, Mario Odyssey, Smash Ultimate, Xenoblade 2 and 3, Pikmin 4, FE three houses, Luigi’s mansion 3, Splatoon 2 and 3, and bayonetta 3 in the last 7 years? All these games can arguably considered the best in their respective series too.