I don't know what comes first, what is cause and what is effect, but in my mind the thing you're talking about is very closely related to our innate ugliness as British people *
Like I'm not sure you can have a truly happy country, that experiences collective pleasure and takes it for its birthright , if it also feels itself to be ugly.
And I think a lot of that transgressive behaviour of pissing on your mates kebab and then throwing it at a bus or whatever, is like this embrace, a celebration, of, our innate ugliness. Like the pleasure dome has been denied us, the velvet rope pulled across, so we take the piss and fling shit at each other from outside
*I don't mean us lot of course. We're gorgeous. I mean the masses.