There's lots worth celebrating and preserving about lots of places on Earth. I'm not proud of any of it.

The fundamental issue with these people is extreme zero-sum bias.

Socialist beliefs are inherently based on a zero-sum economic fallacy. They believe that there is only a finite amount of wealth in the world, so one person being wealthy means that another person must be deprived of wealth by them. In reality, economics is a positive-sum game: it's totally possible for the rich to get richer and the poor to get richer at the same time.

The same fallacy explains their rejection of patriotism and pride. They believe that each person only has a finite amount of love and pride to give, so loving and being proud of your own country means that you are depriving something else of love and pride. They can't see that this is also actually a positive-sum game: most people are capable of being proud of the Lake District, The Beatles, and Enid Blyton while also being proud of the Great Pyramids, Petra, Dostoevsky, CERN, Apollo 11, and every other great thing that humans have achieved. Hell, having pride usually creates more things to be proud of - the civilizations that achieved the most throughout history have always been the civilizations with the most consistent and proud civil identity.

We are the only known form of intelligent life in the observable universe, so the least you can do is show the tiniest bit of pride in the English Breakfast.