This probably holds true for all food companies around the world, but especially for the american food industry: to them you all are just cattle. They want to extrakt the most (money) out of you, primarily, and if they can keep you, as a customer, alive for as long as possible with the least amount of effor before you eventually get cancer, diabetes, a heart attack and die, then that's merely a nice "bonus" to them.
On the other hand, in this day and age, with so much free information readily available everywhere, it's never been easier to not feed your body with poisonous food.
Eat mainly organic, minimally processed food and readjust your taste buds to healthy levels. It does not take much time.