I'm Slovene and now we have the same currency and open borders with Croatia again after 22 years.

One of the reasons Yugoslavia fell apart is because the richer north didn't want to pay for the under-developed south. EU has the same problem. The currency without a political union is a time-bomb. I also think the loss of the (educated) population to the north is unsustainable. Croatia has lost 10% of the population since it joined the EU.