In terms of having the “marrying cousins” stereotype.
In Denmark the closest we come to the “marrying cousins” stereotype would be southern Jutland although that trope can be used about all rural areas.
As for being backwards and reactionary, rural Jutland is the place to go.
As for rural poverty and hopelessness an area stretching from northern, western and southern Jutland, over southern Funen to the islands of Lolland and Falster is known as “the rotten banana”. Rural poverty is worst on the northern Jutland island of Mors and the island of Lolland.