I cant stand most of the popular songs in Korea nowadays, so it speaks about the Koreans's taste in music and why BoA is not doing well there.
Anyway, we can always cheer her on. Dont let it get to her head that her work is not appreciated.
Lastly, I think that SM tried to make it up for delaying her comeback. They really promoted her album aggressively. They made a reality show for her. They even had a countdown event for 1s2s. The artwork was well done. Bravo SM for the promotion done this time. Too bad it could not save her sale.
Now let us look forward to her comeback in japan (I assume she will promote 1s2s for one week only). Hope to see her doing promotions for her Japanese album!