your largest city is 9 times smaller than London, admittedly it has some dirtiness as all cities do but I'd say it's cleaner than Berlin (having worked there) which is a quarter the size, certainly cleaner than Paris (although Paris is larger of course), and cleaner than New York (also having worked there) which is fairly close in population.
Certainly, the denser population doesn't help. But on average I think British people tend to litter more, destroy public property etc.
I had never heard of the term "anti-social behaviour" until I moved here.
Don't get me wrong, there are many, many brilliant things about the British and the UK as well. I just wish more people cared - like how does the public not react with outright fury when a company yet again dumps sewerage into waterways, as they have done several times before - and that company is given a slap on the wrist (fine) rather than obliterated & replaced with a scorched Earth policy as it's completely unacceptable.
And those same people who are apathetic to such things say stuff like "oh I wouldn't do that...the canals and rivers are gross and filled with bacteria and rubbish" when I tell them I'm going kayaking or canoeing. Like...be proud of your country! Be swift & decisive when companies pollute the water, or members of the public break something or cause public disorder.
