Must be FRA, especially early in the morning.
If you're in transit, you'll find nothing's open for business.
If it's your final destination, immigration is a joke. You find yourself among all the great unwashed coming off flights from countries where they'd sh!t in your airing cupboards if you weren't watching - and the immigration booths seem to be deliberately undermanned to make the whole experience one you'd want to forget.
Hard to believe this is supposed to a major trade fair city!