First, sorry about being that imprecise, I’ll try to elaborate a bit more.
Loss of interest
I got interested when the murder case appeared. The rings mystery seemed to lead to something bigger, which got me involved. But then it was not really important, nor fundamental to the story. It goes back to a classic western story. And yeah it may be boring. Why would I watch this movie when I could watch another one?
Thinking more about it I think the problem really are from the plot, and how the characters are used.
What I mean by classic western story is that it doesn’t add much to make it stand out from other stories of its kind.
You may want to know why you want to write that story in particular, what you want to convey, and what you want to tell.
The use of characters
You have a lot of characters in that story. But honestly I fee like there are too many. First it becomes hard to track who’s who. Second we don’t have the time to particularly care for them.
I feel like most of them don’t serve a purpose, they are here just to be here.
That’s sad because they all seem to have a past and motivations, but those are not used as they should be. If you focused on some of them you may use them to make the plot more complex in interesting ways.
I hope this is useful and not just discouraging, writing is really hard and I don’t want you to feel like I’m just spitting on your work. I truly believe in your work’s potential.