Admit I'm wrong?? Look, the damage on that vehicle appears to have occurred over a period of at least 5 years. Not like it occurred between oil changes. You must have bought it used from a person who had that in salt water weekly.
You paid for an Oil Change performed by a kid who probably worked at McD's a week before he changed your oil. Was this your first oil change on that truck? It would seem that a few people saw that condition in the trucks life. Like the guy who rotated your tires, the guy who did your brake change out, previous oil changes and so on. More importantly is the one person who should have been aware of the deteriorating condition of their vehicle. Know who that person is? YOU!! You screwed up by not paying attention and trying to save a buck.
As for your statement I can't "admit when I'm wrong". Well , it would be laughable if it weren't so sad. Remember those are pictures of your truck, not mine.