Michelle Williams and Tom Hardy in Venom.

Venom is a sometimes-entertaining mess—but it’s still a mess.

Let’s get the obvious out of the way: You shouldn’t have a Venom movie without Spider-Man somehow playing into the villain’s backstory. Venom looks like Spider-Man in the comic, because thesymbiotefused with Peter Parker first, resulting in the “Spider-Man on steroids” look. However, this film has no Spidey, and no Spidey means the monster needs a different origin. Now Venom comes about because of a space alien that passes through an evil scientist’s lab—a space alien that looks a little like Spider-Man.

Tom Hardy labors hard at playing Eddie Brock, an investigative reporter who is infected by the symbiote and starts biting off people’s heads, PG-13-style. Brock winds up with Venom’s voice in his head and an ability to make Venom sort of a good/bad guy. It’s all kind of stupid; the film plays things mostly for laughs and squanders a chance for a real horror show.

Some of the action and effects are pretty good, and Hardy gives it his all, but the film feels like a botch job from the start. Michelle Williams gets what might be the worst role of her career as Brock’s girlfriend, and Riz Ahmed plays the stereotypical villain.

There are hints of something cool here, but they are buried under a pile of muck.

Venom is playing at theaters across the valley, in a variety of formats.