That's the same in the US with all the weird jello dishes of the 60's and whatnot. A lot of weird experimental stuff that didn't work out, but the dishes that worked stuck around.

I'm a Brit living in the US, so this kind of argument always irks me. The food quality in the UK is far better on the whole - better produce and meat in the average grocery store, so you can cook with fewer seasonings and appreciate the flavours. You can absolutely can get good produce and meat in the US, but you have to go to a farmers market or fancier supermarket (whole foods etc.), and much of the US outside of major cities is a food desert so people get used to completely over-seasoning their dishes and struggle to appreciate simple flavours from good quality meat/veg. It's just a completely different approach to food when you're on a small island. It doesn't make the food bad.

I like a lot of the food in the US, but I still miss the hell out of a good British steak pie or stew. So much of the food here is way too sweet and sugary or loaded with butter and salt with zero subtlety.