Copenhagen interpretation is not that easy to debunk. It is not backed by any additional math beyond all of the quantum physics math that is solid but backs multiple interpretations.

In physics if something doesn't have its own math then it is just an opinion. You can't prove it, you can't debunk it, you can have different one. Ultimately it doesn't matter.

For me Copenhagen interpretation becomes absurd from the moment it states that observer matters. Each observer is just lots of particles and the fact that they arranged to have eyes and brain can't possibly matter for the basic laws of physics.