I didn't really like Imaginary. There was potential for something pretty good or entertaining, but it just ended up being a really average supernatural-horror film. It lacked scares and lacked imagination, and had very little interesting happening in it. The story and the characters were boring and the creature designs were quite poor as well.
In fact, I've watched a few disappointing films this week: Night Swim - An average supernatural horror film about a haunted backyard swimming pool. The cast is pretty good, but they're not given much to work with and the plot is as basic as you would expect from the idea of a haunted swimming pool. No scares, no atmosphere and no tension leaves you with a film that is not really worth watching and that would have worked better as a short film in an anthology.
Femme - I'd heard good things about it, but I found it to be a pretty average drama that lacked the impact it was striving for. It's well acted (Nathan Stewart-Jarrett and George MacKay are really good) but it wasn't as tense, thrilling or gripping as I had seen it made out as being.
Frogman - A boring found footage horror film and a waste of 75-minutes. Poorly written and poorly made, with a lack of scares, tension, atmosphere or entertainment.
The Blackening - A really basic, predictable comedy-slasher that is poorly written/improvised and neither funny enough to be a good comedy, nor scary enough to be a good horror.