Alien: Covenant (2017)
I had actually been quite looking forward to seeing this movie, although the best things I had heard about it were that it's "better than Prometheus" (a low bar) and that its relationship to Alien was akin to the relation of The Force Awakens to Star Wars and The Empire Strikes Back, in that it was a remix. Which is not necessarily a bad thing.It was one of the most miserable experiences I've had in a cinema for a while.
Spoilers and swears follow.