That sounds like 6 years of frustration being vented out over one finale
Honestly speaking though, I think that the finale did a reasonable job of closing a series where they'd never be able to answer all the questions, and where the only options are: 1) it's all a dream 2) aliens 3) magic. Yeah they brought everyone out for the end, but the way they ended it, that made sense. It's not as if they cooked up some lame plot twist just so they could bring everyone back - it was an integral part of the story for some time. One other common misconception (I assume it's a misconception rather than the truth) is that they're all dead the whole time, but as far as I know, they're only dead in the flash sideways timeline.
At the church, Jack's father explains that some people die before we do, some long after. Hurley reminisces about the teamwork between Ben and him, i.e., they worked together for some period after Hurley became Jacob's and Jack's replacement. Someone (can't remember who) explains that "now" doesn't mean much. All of this seems to mean that they were not all dead the whole time. But, considering everything, I could be wrong (or merely lost).