The Syndicate

It was the trick they pulled with the flash-sideways... They pretended it was an alternate reality where the Island had blown up in the 70s, but it was really just the Afterlife. I would have really loved it if it had been an alternate timeline in which the Losties were actually getting memories from another timeline from near-death experiences.

It would have been perfect. It would have saved Boone. It would have meant that the plan for which Juliet gave her life actually worked, and been a happy ending. Instead , everyone just died and went to heaven together, as though nothing BUT the Island had ever been important in their lives.

Yeah, that ending. It was so close to good, but then they just crapped all over everything, all my hopes and happiness. It really still upsets me.