I am not a engine expert but those rods and mains bearings look like they have been run with out oil also
That is why I posted those pics, as that would indicate a more systematic oiling problem.. I am not sure how the bearings typically wear. They are "dull" out of the box, and not sure if that comes off over time or not. I can tell you there was oil on the rods and mains when I took it all apart. And the crank journals look perfect.