What did everyone think of the finale of Lost? (Possible spoilers)?

I personally felt really dissapointed and it just left me with loads more unanswered questions like what was the dharma inititve stuff about? What was the point of the Charles Whitmore element? When exactly did they actually dies? and what happened to all the other characters, where they dead too and if so why weren't they in the church at the end? Not to mention an awful lot of plot holes! What did everyone else think!?