So, if it's not roasts, what is it? Alien life forms being raised at Area 51, specifically for Arby's? Roasts do get soggy, and sponge like when they are heavily marinaded for extended periods of time, and beef does have a tendency to change color when it's aging. It's that repulsion factor that you indicate you have that forces these people to use food coloring to make it "pink" so they don't freak out.
I'm not defending the food industry, nor Arby's, because their practices aren't the best, but you're making it sound like it's pressed chunks of crap beef left over, thrown in a bag, and that's not true.
You probably shouldn't eat at too many restaurants in this day and age, the way it sounds. A lot of them have their food shipped in from a processing source, in cryogenic bags, which they open, and dump into whatever they use to cook it. The "home made" process is darned near history.