I feel like the UK supermarket industry took The Paradox of Choice too seriously.
The UK produces more varieties of cheese (about 700) than any other EU country. A lot of that is from small independent producers. Obviously, you'll find a narrow(ish) selection at the supermarket, but it's pretty easy to find a wider variety from specialist or online retailers.
I speak as an Irishman who had a terrible time merely finding decent bread when I moved here (there is zero good soda bread in any British supermarket, I actually imported and froze mine for the first few years, then I went the bread maker route, until I made my peace and stopped eating bread at home), with a German partner for the past ten years who feels even more strongly about it than I do.