Earlier quoted context omitted.
On the basic premise EU is working wonderfully. It's the longest period in our thousand years history that we Poles have not had to fight Germans. We have lost maybe even 1/3 of population in wars with Sweden, 1/5 of population in war with Germany. Poland didn't exist or 123 years under Russian, Prussian and Austrian occupation. Given that as a baseline, I'm really grateful for the EU.
Even within the EU it is clear that low income countries have worse life than high income countries, just like everywhere in the world. And Europe's real median income is decreasing in most of the countries. Surely, it will have effect in few decades. [1]: https://www.euronews.com/next/2023/08/21/real-wages-are-down...
It is easy to imagine a war torn Europe without the EU. Then we would definitely be worse off.