Part of our problem is seeing ourselves as others see us. We tend to go along with the rubbish and hype in our own press because we've become inured to it. Less so foreigners, who on the whole still tend to respect this country and all it stands for, BRexit or no.
We have more Diplomatic skill and clout than the rest of Europe combined, so when it comes to serious negotiation in a future Europe, nothing will change for us, unless maybe for the better... Germany and the rest meanwhile, will go on taking lessons in statemanship from the UK and France.