This will be highly controversial, but Event Horizon.

I loved the setup. I loved the design of the ship. I absolutely hated the wildly inconsistent tone and logic. I couldn’t really work out what the movie wanted to be. Some scenes felt like it wanted to be a psychological horror, others a tribute to Alien, with a smattering of ridiculous 80s action jokes thrown in.

Its one of the few movies I think that is begging for a remake. It has all the elements to be something incredible, but that execution was not it.