Has anyone seen The Beast from 20 000 Fathoms? The stupid dinosaur basically just wanders around, destroying whatever happens to be there for no real reason while people briskly jog away, not even looking remotely scared or shrieking.
I'd hardly call the Rheduasurus a "Rubbish Monster". It's one of my favorite examples of Harryhausen's work.
I think a modern day rubbish monster could be "The Creeper" from
Jeepers Creepers. In the first one is a shot where you can see the zipper in the suit. And in the second one is that scene where he's looking into the bus at all the people. I think he looks like an evil muppet in that one. Totally ruined any chance he had of being scary to me.