It still did better than Witcher s3, but that's not saying much.
I'm not surprised it didn't get a lot of love. It's too cerebral for blockbuster appeal, doesn't have any of the humor or pop culture draw of Stranger Things, and the characters are pretty flat. The only character who's mildly appealing doesn't stick around for long.
I have zero attachment to the series and don't plan to read the books. Some of the main features of the antagonists just don't make sense to me and I hear that characterization is even worse in the books.