The problem is not whether the EU is weak or strong. The problem is the Qajar mentality in Iran.
Look at how anti-Iran Germany has become. They supported the Israeli war against Iran both politically and militarily, made anti-Iran statements throughout the last month until now, some of them are unprecedently hostile, and are going to trigger the snapback mechanism. Not even a single letter of protest has been sent to the German embassy in Iran.
The pro-IR idiots love to boast about how the IR is independent and the Pahlavis were US stooges, but history is proving that the Pahlavis were much more competent than these fools. The amount of passivity in this regime is only comparable to the weakest point of the Qajar dynasty.
And yet, the German ambassador has not been summoned.
The sad thing is that Germany is not even an important country in the world stage. It is not a permanent UNSC member, it is not a military power, it is not a nuclear power. It was the reformists with economic ties to Germany that wanted these Nazi fools to be part of the JCPOA.