>>30166206Gen 4 had fucktons of postgame single-player content, though. Platinum especially. Even putting aside the Battle Frontier vs Battle Maison arguments, Platinum still had a fuckton for you to do that wasn't just mindless grinding or collection like Gen 6 and 7 mostly have.
Gen 6 was fucking garbage with postgame. The Looker Quest in XY was a waste of time, and the Delta Episode was easily beaten in less than 3 hours by even the most casual of players. The only really fun thing to try to do is collect all of the mega stones and fashion items, but those can both get tedious in places (and ORAS can't even do the latter).
So far, Gen 7 ain't doing much better. The Champion Defense matches have some novelty value and are neat, but will get boring quickly since you still have to grind through the E4 each time. The UB quest was pretty fun and a step in the right direction, but when you boil it down it's basically a fetch quest where you catch specific mons that you were gonna have to catch for Pokedex anyway.