I don't understand why people are so down on the ending.
the show wasn't necessarily about the island but about that specific group of people on the island at the time. many groups before them, many groups after them. Hurley was the protector after Jacob (and jacks very short time) and I have no doubt there were protectors after Hurley.
that last season with the alternate time line that turned out to be purgatory or whatever was just a way to bring everyone back together at the end of the show. maybe I am in a minority, but I liked it.