Let me know some specifics. If you look at banking, the EU has failed to make any major dent in London as a financial centre. Bank headquarters have not moved. Bankers have not moved. London still rules the financial world.
Also interesting to see is the other side, what the EU has progressed to since then. The new German government is saying they want full federalisation. Exactly what the leave camp was saying. Things certainly seem to be going that way. Moves to establish EU army. Strong arming of Hungary and Poland, overstepping the legal mandates of the EU some argue. So what exactly in this case did leave get wrong?