Definitely should not have been marketed as a horror film, I see why people were disappointed if they were expecting a more traditional "supernatural haunted house" story.
That being said, I avoided pretty much all the marketing before watching and enjoyed it overall.
Loved it from a technical standpoint – every(?) scene was done in a single take, I think from a drone that was operated by Soderbergh. All filmed from inside the house (except the final shot). The Poltergeist-y…