Dune. 6.5/10. Maybe it was the theater where I saw it but there must have been an eclipse on Arrakkis because the picture quality was dark as crap. Also, I don't remember Jessica being such a crybaby in the books.
Black Widow: 5/10. If The Eternals is the worst Marvel movie to this point, it has this one to beat. The sister's cute and provides comic relief but it was pretty damn bad.