uh idk about the treatments thing in general but the pink slime myth about the nuggets specifically was both circulated and debunked before 2010, and the image that was going around of it was not taken in any facility relating to McDonald's.

You would have a point about the beef being treated with ammonia and homogenized, but according to AP, "McDonalds stopped using the by-product, known in the industry as lean, finely-textured beef, in 2011" here is their source on that

I really don't consider myself a McDonald's defender but the least you could do is say things that are current or even just recent and true lol