I'm not proud of Britain, or England or whatever. I really feel very little patriotism and never have. When I fought wargames at school it was "my mates versus the bad guys" not "England versus the Nazis". When I get sufficient funds together (not for some years) I'll move away, possibly to Canada or New Zealand. My attachments here are only people and inertia. Much of what I do I can do from, well, anywhere... I don't even like the weather here!
For me the UK is roughly zero sum, certainly nothing worth being proud of. I have a sufficiently low opinion of global politics that I struggle to think of a country that I would feel proud of, but I can certainly think of places with better weather or better internet access, and those I can enjoy every day.