>>Go to an actual butchers, and you'll be fine

The thing is, I've lived here for 10 years and I haven't been able to find "an actual butcher" yet. Every single place that looks like an actual butcher shop ends up being just a meat store, where the meats are prepared and packaged elsewhere, and the people in the store just sell it. At best, they will have a large chunk of say pork loin, and they can cut a bit off for you.

Very much this. Not in the UK (US here), but there's been a bit of a resurgence in butchery as a profession. So, this leaves me in the rather nice position of having not one but two 'real' (USDA inspected) butchers close by, but many butchers these days will also ship.

My subjective experience is the quality ranges from "noticeably better" to "OMFG how have I never had something this good before better" than the supermarket offering, though clearly at a higher price point.