Archaeopteryx would taste delectable anywhere.

Ceratopsians would be treaded a lot like rhinos and elephants.

Poached for the horns, and probably left there for the scavengers.

They still do exist today

Ngl, I can just see an Edmontosaurus walking through Alaskan wilderness like a moose

^ That's another thing, this is how is see dinosaurs going extinct if they weren't extinct already....

Ceratopsians and Stegosauroids - Overhunting for their horns and thagomizers. (Possible hunting for plates and [food?])

Tyrannosaurs and theropods - Head mounts, teeth, skulls, ribs, and medicinal purposes (i.e. Baryonyx teeth heal all infertility or something)

Hadrosaurs and Sauropods - habitat destruction and overhunting.

Imagine eating cooked dinosaur ribs.