There are so many different ways to quantify "worst" but as far as the gap between hopes and reality this has to be the rock bottom

I could literally follow James Cameron around for the rest of his life just asking him over and over "Why wasn't it as good as Terminator, James? Why wasn't it as good as Aliens, James? Why wasn't it even as good as True Fucking Lies, James? How the fuck did you make the greatest scifi action movies ever and then you got 20 years to work and a billion dollar budget and all you could give us is this dogshit? Huh? What happened to you?"

Just stand over his bed repeating it over and over every night for years because no answer he gave could be satisfactory