Correction:Gen 1 and maybe gen 2 are really beloved.The rest is just grouped together.Just go out and see what are the usual pokemons that are used for marketing:Pikachu, Charizard, Eevee, Squirtle.And so on.Not only that, but only the mainline pokemon games sell well(and their remakes, which are based on mainline games).Most mario games, spin off or not, sell well.You get where I am going with this.
But Ill admit that pokemon is an oddity in the sense on how well it has survived without basically doing anything new.Its probably nostalgia mixed with the pleasure of capturing creatures, which Pokemon basically pioneered.And thats what makes me so sad that its stuck in the past.
According to whom? Just because you may not be into the games anymore doesn't mean it reflects the reality of the situation it's survived and outsells those games you mentioned because it's beloved as well, games like Mystery Dungeon have sold in the range of 4m which was the average for Zelda games for the longest time and a parallel branch in Lets Go literally just sold 10m in 2 months.
Sorry I get the game doesn't match what some people hoped for but this was nonsensical.