I forgot Tenet. I actually went to see it twice, God help me.
I thought I must be missing something, but it was just the same incomprehensible bollocks with so much loud background noise throughout I don't honestly know how anybody could follow it.
I'd like to make a special mention for Down With Love; I saw it on a plane rather than at the cinema so it doesn't technically qualify. It's hands down one of the worst films I have ever seen anywhere, and I've seen Sex & The City 2.