How do you measure success.
Funnily enough my DD had successful as one of her spelling words yesterday. We had to define the word too.
Successful was defined as "having achieved fame, wealth, or social status."
Well fame from Brexit- nope more like infamy and being laughed at.
wealth We had been the fifth richest country in the world.
Giving up unrestricted access to a market on our doorstep worth $18.8 trillion of 500 million consumers is a fairly high risk thing to do.
Even the most anti EU politicians don't say we will ascend to 4th,3rd,2nd,1st richest by leaving.So it's not wealth.
That leaves social status. From other countries perspectives we were a leader in the EU. A dominant force. My Polish friend said other smaller members envied our leading position. I think we have less status now not more.
So it doesn't really have the potential to meet any of the success criteria.