Solid cam damage diagnosis help

The wear pattern looks terrible to me.
Way off to the edge.
You should check the lobe taper to see what it is.
(There’s either too much taper, or the lifter bores aren’t exactly perpendicular to the cam c/l, or there is insufficient crown on the lifters...... or a little of all of it).

It also appears to be a cam with a rather small nose radius.
Add in the wear pattern way off to one side and the high open spring loads, and it’s easy for me to imagine why there is a piece missing from the nose of the one lobe.
Too much loading concentrated in that one little area...... the material just gave way.

As for the lobe that’s getting squared off on the nose.

The only cams I’ve seen with that specific kind of wear were run with tool steel or Schubek lifters.

Im not seeing a “wear” problem...... it’s a problem with how the nose of the lobes are being loaded.
More specifically....... the load over the nose not being spread across the entire with of the lobe.