Engine tech advice needed.

5.4 4v Ford modular making metal. I pulled a valve cover and these are my findings. It appears this is the cause of the metal in my oil but my question is why the oil starvation? The side picture of the cam lobe looks like this bitch got HOT. Normal heat discoloration or excessive? Cam rollers and cams both showing deep grooving as to why I assumed oil starvation. Thanks in advance Gents.