>>25123202I disagree, I think you just couldn't get into there only being new Pokémon and didn't get invested into the rest of the game as a result.
As to playing BW2, if my hunch about it just being the lack of old Pokémon is true, you might enjoy it more since they throw all Gens into the mix.
I personally really liked Gen 5, it felt like Pokémon just fine for me, the only departure is the heavier story focus (which XY also had) and them forcing you to use new Pokémon (which I do as a rule whenever a new Gen comes out anyway, though I broke it with XY since they threw so much Genwun pandering at me that I had to take it).