On a trial and error basis, through boom and bust, the Euro had now been falsified.
If you supported it at birth, you are now proved wrong.
If you thought the Euro was really the old Deutschmark in new colours, you have been proved wrong, the Euro is a soft currency not a hard currency.
If you believe it can be made to work, then you will need a debt union, which will need a proper political union, in which case you probably have been lying or delusional all these years about such prospects.
If you still support this idea now, you are *stupid.
*stupidity being doing the same thing over and over again expecting different results.