Why do many people scorn British food?

edition.cnn.com

When I visited UK, I didn't think foods served in that nation was disappointing, except for mysterious food I ate in Lake District.
There, I ate salad with grilled fat. It was the oly time I felt disappointed with British food.
Though I didn't encounter most of the foods on the article, most of the foods there were as tasty as ones in other European countries.