I remember the shock of moving from Tokyo to London. Despite of London not being the dirties of the cities I saw in my life, the gap is huge. Litter is everywhere even when the trash bin can be found close by. People do not respect public places, walking with your shoes on benches is normal, no one removes their shoes anywhere (example: I even saw people walk with shoes on in the soft play area where small kids are crawling touching and licking everything around,) toilets in restaurants are so dirty that I try to avoid using them if I can help it, dog's poop on the pavement, tons of bubble gum on the pavement, too. The drop that overfilled the cup was seeing bunch of young people walking from pub to pub, one of them left with glass half of beer in his hand (red flag already,) drunk few more times, and threw the glass with the beer, what's left of it, in the flowery spot. In the city center, middle of the day. It's so depressing...