The UK is functioning okay, actually. Not being able to agree on what Brexit means is quite a minor problem by world standards. It doesn't change the fact that

The UK is functioning okay, actually. Not being able to agree on what Brexit means is quite a minor problem by world standards. It doesn't change the fact that the UK is a highly developed country both in terms of GDP and HDI, has excellent infrastructure, plenty of food, etc. And the UK is not a federation, at all. The central Parliament in London wields all power and the devolved legislatures (in Scotland, Wales, and Northern Ireland) only have whatever authority the central state chooses to allow them to.