In the UK there are plenty of places where you can get food which is much more "real" but not necessarily healthy. There are lots of independent takeaways and cafes selling fish and chips or cooked breakfast around that price. There are plenty of places around markets where you can buy fresh food for that price, which is actually healthy. If you have access to a kitchen you can buy stuff and cook 2 meals for half that price.

Plenty of Indian and Chinese/Asian neighborhoods offer meals at incredible value too.

The only time I would consider something like McDonald's is in the motorway services where almost everything is run by big chains, the other time I go is because the kids get excited about the new happy meal toy.

In and Out burgers is reasonably priced, but not MD.