Colonel Sanders reportedly hated KFC's gravy after selling the company, calling it "horrible" and comparing it to wallpaper paste in a 1978 interview.
https://www.foxnews.com/food-drink/kfc-menu-item-colonel-sanders-hated-became-one-chains-biggest-staples
https://www.foxnews.com/food-drink/kfc-menu-item-colonel-sanders-hated-became-one-chains-biggest-staples