I was raised in the States by Brits and my early diet was sooooo much better, too. As my parents became "Americanized" it got worse and worse.
Unfortunately, "progress" in this country has been equated to more processed food. Factory food has been seen as "cleaner" than food direct from the farm.
Things are changing, but you won't see these changes starting in the institutions like a hospital. Find your local food coop or Farmer's Market!