Super bummed. New motor. Bad bearings?

I am not saying that something isn't wrong, but it's not abnormal to have a little something in the pan and oil filter, cut the filter open and see what's there. It's easy to scuff cam bearings when installing the cam. Same for piston install and first run.
Did you prime the oil system before start up?
It is easier to work on the engine when it's out, but verify if something is really wrong first.