If you had to list the ten most important people in the history of human thought, at least three of them would be British – Shakespeare, Newton and Darwin. That's not bad for a small island. Newton and Darwin are two of the most influential scientists who ever lived, and John Locke and David Hume are two of the most influential philosophers, not to mention Francis Bacon, who established the modern scientific method, and Adam Smith, who laid the foundations of capitalism. In fact, Locke is the intellectual father of modern liberal democracy. Without British culture, the USA, Canada, Australia and New Zealand would not exist in their present form. Instead, the world would be dominated by Russia, Iran and China. It was our 'embarrassing' culture that produced modern evolutionary theory. It was our 'embarrassing' culture that produced modern atomic theory. And it was our 'embarrassing' culture that discovered DNA.
Then there is literature. Britain pretty much invented the novel, and Shakespeare and Dickens would be in the top ten writers of all time. Find me a nation/culture that has produced a list of writers to match the following: Chaucer, Shakespeare, Marlowe, Spenser, John Donne, Milton, Blake, Defoe, Fielding, Johnson, Boswell, Pope, Scott, Wordsworth, Coleridge, Shelley, Byron, Keats, Jane Austen, George Eliot, the Brontes, Dickens, Thomas Hardy, Sassoon, Wilfred Owen, D. H. Lawrence, George Orwell, Aldous Huxley, W. H. Auden, Tolkien, Virginia Woolf.
People constantly bang on about slavery and colonialism. EVERYONE had slaves and empires. The Assyrians, Egyptians, Romans, Babylonians, Aztecs, Incas, Zulus, Mughals, Spaniards, Mongols, Ottomans, Arabs, etc etc all colonised and enslaved their neighbours. It's what human beings have always done. We still have empires today. Try telling a Tibetan or a Uyghur muslim that the days of empire are over.
The left can distort and re-write history as much as they like, I'll just ignore them. And no matter how much they try and force/impose a new identity on me, I'll resist it to the bitter end. I already know who I am, thanks.