When leaving a club, don't expect club rules to be changed to benefit you at the expense of remaining members.
Expect your debts and commitments to be pursued, in full.
Statements that your creditors can "go whistle" won't encourage your creditors to trust you.
It should come as no surprise to adults that the more powerful in a negotiation use that power advantage, as we have a history of doing (e.g. in the slave trade and the Commonwealth, the proceeds of both of which we continue to benefit from through the infrastructure advantage resources from both gave us).
Without the UK, the EU will remain the second largest economy in the world.
As a nation, rather than "taking back control" we have chosen to be supplicants. Post Brexit, we will be weakened by no longer being part of the second largest economy in the world. America, China, India etc will take advantage of that weakness in any trade deal negotiations, including those with the World Trade Organisation.
Since the referendum, we have learned more about the complexities and dangers of Brexit. To ignore what we have learned, and continue to learn, would be to betray "the will of the people". Our sovereign legal system of government, Parliamentary Democracy, demands that our supreme legal authority, Parliament, not the government, has the final say.
A Statement Of The Obvious that we British, in our collective arrogance and wilful ignorance, seem incapable of grasping:
The rules of a club I join then wish to leave are made by the club not by me.
re Brexit: "Just a polite reminder to British exceptionalists that our only decision will be whether to accept or reject whatever the EU27 offer us." ~ Seb Dance UK MEP
In our collective defence, the Single Market and Customs Union (and so much more required for an informed referendum vote) were rarely (never?) mentioned by the instigator, PM David Cameron, nor by "The Brexit 5", Nigel Farage, Boris Johnson, Iain Duncan-Smith, Michael Gove, Jacob Rees-Mogg and their Brexiteer fellows. Quick, someone call a statistician. Sorry, we can't ... they're experts!