Above you have variously compared the UK leaving the EU to:
- America gaining independence (1776)
- Ireland gaining self governance (1922)
- post colonial African states leaving the British Empire and gaining independence (post 1945 onwards)
I appreciate that you are trying to make a general point that when a country's political status changes, then this can have varying affects on its long term economic health. Fair enough.
But all of the examples you have given are of states gaining independence from their colonial masters. The countries you name weren't members of a union/bloc freely entered into, as when the UK joined the EU. They weren't influential members who formed many of the key institutions (such as the single market). They were part of the British Empire, colonies who fought wars to be independent.
It's a laughable (and incorrect comparison). It prolongs the dangerous myth that somehow the UK is the victim in all of this. Well we're not. For various reasons the UK has decided to leave a partnership of equals. The Leaver argument can be summed up as 'if I can't have it all my own way, then I'm leaving. And hang the consequences.'
But don't confuse that with fighting for independence.