Thanks NJ for the respectful reply. It occurred to me before coming to write this one that I risked just rehashing old arguments that have been said before, so I'll stick to saying that in most situations when you either leave some institution, or request to, it's generally sensible to have an idea of where you'll be going instead. There's an amusing analogy of the UK's Brexit vote as being like telling your parents you want to leave their house, but after discovering you have nowhere else to go ending up in the garage.
Perhaps it does depend on perspective. I can't pretend I'm not still saddened by the result on June 23rd, and that obviously is going to colour my opinions on this for a long time to come. All the same, it stands to reason that leaving in a manner that is, even slightly, self-destructive is just a bad outcome, and not worth the trouble of leaving.
Having now decided to leave, we should work out where we are going next before heading out the door.