Talking about quality of life is usually a coded way of talking about not really living in a city. Yes, London is relatively noisy, dirty, cramped, etc. The only way you can get less of that in the UK is to also have less of the benefits of living in a city. I mean, there's no other city in the UK that even has a proper public transit system. Not liking cities is, as I said, a personal preference, and perfectly fine.