There's been £££ thrown at the problem to get as far as we have - the trouble is that alcohol is a pretty fundamental part of the flavour of most beers. Most of the macro breweries are still not great but there's some decent stuff among the smaller guys. It's a lot easier to make AF/low lagers, and Europe is way ahead of us on low-alcohol stuff, in Spain it's about 15% of the beer market. So lager from the Continent (excluding the big boys) is generally a fairly safe bet, Estrella is probably the best of the better-known ones.
Ale is rather more difficult, the Bernard Amber lager is a good substitute if your preferences lie with traditional British bitter. AF Speckled Hen is particularly grim.
Some of the hoppy stuff isn't bad - Ghost Ship is a reasonable mainstream option, although I'd slightly prefer the blue Brooklyn Special Effects (which seems to have been rebranded from a lager to an amber...). Punk AF is better than Nanny State. In Sainsbury's I've seen a NA version of Clwb Tropica which sounds interesting, and which has a rather better score on Untappd (3.23) than Punk AF (2.92) or Nanny State (2.71). Sainsbury's also have Mikeller Drink'in The Sun (3.25).
I've had a sour (I think from London Beer Project but it doesn't show up on Untappd) which worked really well, and there's definitely potential in that area, which could appeal to people who "don't drink beer".