Isn't the EU rather like a single point of failure?

No, every country remains sovereign. Hungary's previous regime ignored the EU for over a decade. Many countries are instituting border controls again despite the Schengen agreement.

These are the biggest issues in the EU. You make it sound like a positive thing. These countries erode the trust in law and exploit the subsidies.

You think the biggest issue in the EU is that it doesn't have enough power, parent thinks it has too much power.