The misunderstanding is that they believe the double slit experiment can't be done with electrons, which are supposedly very much particles, instead of the photon having properties of both.
What they don't understand is that particles are a myth and it's just waves all the way down baby.
Did OP know that too? It doesn't really matter, the meme is still right but phrased in a way that might trip up someone that doesn't know electrons can do the same thing.
This meme is about the difference in scales. When your electron's delocalization is much greater than other scales in your system, the electron behaves like a wave. Otherwise if the electron's delocalization is the smallest scale, it behaves like a particle.
If you can look at the setup of an experiment with your bare eyes, the electron behaves like a particle. If you cannot - it may behave like a wave.
If you setup a detector that measures which path the particles took, the interference pattern disappears- again something you can see with your bare eyes.
For electrons you can't do it. Either way the interference is not a quantum effect and the detector that you are talking about is a simple reemiting device that detects the wave vector and creates the wave in the same direction. Now live with that.
Why are you giving me a theoretical paper? It doesn't even have sizes, but I assume that the distance between two holes is about 1um, which you cannot see with your bare eyes