The worst case Euro disaster might be in Finland. Compared to Scandinavian economies with their own currencies, the real inflation has been horrible.
1999 one could buy a carton of milk for 1mk, exchange rate to Euro became 6:1, now a liter of milk costs about 1,2€. So the actual purchasing power has decreased close to 20% a year.
Same has happened to Spain, for example. Many services are bankrupted, so it is hard to imagine ever returning to the time before the Great Reset.