because the story used a plot twist that has been so overused.
It's so interesting that you say that. I think with the massive amount of media out there it is hard to find stories that are whole original in terms of plots. Though I absolutely agree with you about how it can be disappointing. :D I have not seen that show, but I watched a movie recently, Gods of Egypt, and I spent the entire time groaning and moaning about the plot being cliche. I found is so predicable, with a Mary Sue character, that I was laughing the entire time, much like watching old B-movies, something I love! Pure comedy gold! :D
I digress! :D I think the only thing we can hope for is stories that may use the same plot twists as always, but the characters become original. After all we have so many people on this planet and every one of is is different. :D I hope!!
Like you, I have my fingers crossed about the future of Stranger Things. I have a source of surreal, but I like the idea of the world they are building in Stranger Things. I would love to see it matured even more.