I think you are not doing your research. The best drops in the game are from DS. But I will agree it has the highest percentage of useless stuff in the game also. Just keep farming the right bosses and you will be amazed with the return.
No kidding it isn't you, i killed one boss over 30 times to get my death blade.. (note got the death sword twice and I didn't really want the thing)Sigh I lost count on how many times i am STILL killing a boss to get my death ring. I am really not looking forward to the gauntlet run to get to the boss for my death deck.