It's a handheld, it's by definition the lesser experience. It's literally designed to be a compromise, and especially in these days that meant you get simpler games with smaller scopes but in turn you can take them on the go - which to many people is outright useless.
The DS/3DS are the worst Nintendo handhelds (worse than GB, GBC, GBA) because this was the time where Nintendo really went all in on their gimmick shit, only to abandon one of their gimmicks (3d) later on anyways because obviously their gimmick sucked, as most of them do. There's a reason double screens didn't make a return yet, lmao. Nintendo fans will tell you about the "innovative" games this brought forward, when in reality 90% of it was casual 0.99c iOS store quality shit like Nintendogs or the second screen was barely an after thought and only used for like a map or something.
The Wii is only slightly less shit because it actually had a couple of great games (most notably Mario Galaxy 1/2, Xenoblade) but still represents one of Nintendos worst times, in terms of me looking forward to what they have in store.
So yes, ds/3ds was nintendo at its worst.