Psychological horror movie "Sauna"

[Deep One]

I like the grey setting in finnish woods, but it disappointed me somehow.
The story is very bad, they should skip the Sauna part in the swamp - that was really disappointing and the end with the demon also. Very strange movie and nice pictures, but bad story.

Can you be more specific? I know it's just matter of opinions, and I respect yours, but why is the story so bad in your opinion? I think the story is pretty good, and it makes sense. In Finnish folklore, sauna was a sacred place where you washed away your sins.

Spoiler below!

And about that demon at the end, I think it was some kind of metaphor. "Even the innocent ones can't escape the sin", y'know?