we're not exactly living in the utopian society that we were promised
I've no idea what promises you're referring to. I'd be astonished if anyone promised that brexit would bring about a utopian society, that seems like hyperbole verging on ridiculousness on your part.
If anything brexit has proven to be as disastrous as everyone who opposed it predicted.
I've no idea what predictions you're referring to or what disasters.
The brexit voters are utterly unprepared to accept they made a mistake
I don't see how voting for brexit was a mistake. Again, the UK is out of the EU. Seems successful to me.
That doesn't mention domestic sales.