Yeah, I can understand that. Undoubtedly the EU has changed over time, and many people might not like those changes. I'm just suspicious of the claim that the EU is very different from the EC voted on in 1975. In some respects it is, but I feel it is misleading to look back and say it was just something like a loose free trade agreement. It was much more than that even when we originally joined, though it could be argued that the general public weren't very aware of it.
On the other hand, I don't know if the general public understands the EU now, either.