That was my initial reaction as well. I hated the SotC ending... until someone better explained it to me (I believe it was Gene, if you wanna pester him for a breakdown). Still, it could've been SO much better!
Having said that, I beat Castlevania: Portrait of Ruin
last night with about 950% completion (I'm guessing 1000 is max?). It was a fun game, but the ending was your typical CV cop-out. I could still go back in and finish the Nest of Evil and the last few quests I unlocked, but... I think I'm done for awhile.