Jack shephard you're dead and this is your afterlife

It was a bit of a disappointment. It was very long and stressful 6 years and I feel betrayed
Answers were not provided. People were missing from the finale.
It upset me that they went with the religious explanation and not the scientific one.
That Jack as a man of science started to believe and that in the end it was all for nothing.
They are all dead.
It started as a great tragedy; people are struggled on a deserted island. Fighting for their survival and their rescue. The show was a great character study and showed us that people try to change and fail.
We fell in love with them, we cheered for them and we died with them.
The island has a heart and it had it’s own agenda but the explanation that it was all for nothing, that it was a struggle to get in terms with your own death is just the easy way out.