... I suggest 'patriaennui' (L. patria, native country, F., ennui, a contraction of L. mihi in odio est, meaning 'it is hateful to me'.
What am I rambling on about? That vague feeling of dread that seeps into my bones before I am 10 miles from Heathrow. There's much to admire in Britain, and of course seeing family and friends is a joy, but I just have an emotional reaction to the place and a sense of guilt for not feeling more at home here.