In the UK we call it Northern Ireland, in some/most[1] parts of Ireland its called "the 6 counties".
[1] I only have a limited frame of reference here
Northern Ireland is far from a third world Country, don't believe everything you see on TV, come up and visit us and see for yourself :)
Hah, if that isn't the perfect illustration of the folly selecting your data to support your argument.
No doubt N Ireland is lovely. Dublin is too. A lot of people of the world be thrilled at the opportunity to live in either place.
And I'm sure both have worse parts, since every sizable settlement needs a less desirable part to concentrate it's less desired residents.