Super bummed. New motor. Bad bearings?

Some of the slivers had a chromish look. Like plating. I'm really worried that I run it and cause damage to crank/rods.

I did pull a main cap while I was under there and there was clear evidence of contamination. There was grooving And a few spots I could feel with fingernails.

Chrome look... like cam lobes? :(

You already know the mains got trash in them. Rods may not be any better. As already said, it should all come apart for cleaning and inspection.