That is 100% true. The Western European Union members (i.e the original members) made so many concessions to the new members (i.e those from the former Warsaw Pact), so that they will join the organization. But in due course, the Eastern members started misusing their privileges, angering the citizens of the western nations. For example, right now the British welfare system is exploited to the core by immigrants from Poland, Romania, and Bulgaria. In some cases, native British were evicted from the council flats, to make room for these immigrants.
You seem to have problems with migrants, but they're not the real problem. Wanna know where the real problem is? Ireland and Luxembourg. Those two countries are the biggest parasites of EU. Migrants are a problem, but they could be easily dealt with with a good economy and enough money. But fact is that all the BIG COMPANIES in EU have offshore companies in Ireland an Luxembourg where they pay nearly 0 taxes. It means, for example, that Apple makes billions of € in EU and gives NOTHING to EU states. And then we got debt and problem with migrants... But with Apple, Google, McDonald etc money, we could get rid of the debt, lower taxes of the people, have a better economy, less unemployment and suddenly migrants would be a much less important problem!
Sounds interesting. I didn't know that about Ireland and Luxembourg.