I don’t believe there’s doubt in any quarter that Brexit has damaged Britain’s economic performance. Even the government stated as much in their ( originally concealed) impact assessments. To say otherwise is wishful thinking or wilful misrepresentation. The only comfort the Brexit peddlers can take is that the results of their actions are masked by the economic damage from Covid and now Russia. It’s the same technique Johnson used in an attempt to conceal his own failures.
Britain has damaged itself economically and reputationally and I’m not convinced it’s reversible . It’s not just facing international instability, it’s going to have to manage internal instability now as well.