If dinosaurs were kicking around with humans during the past several thousand years we would find their bones in archaeological sites.
We do not find them. We find just about every other critter, all the way from minnow bones up to the bones of extinct mammoths and mastodons, but no dinos.
Of course, maybe we're looking in layers that are 65 million years too young, eh?
All the layers are the same age moron.