The "Copenhagen Interpretation" of the double-slit experiment is pathetic! It opened the door for all kinds of esoteric crap and made your science turn into scientism.
Since particles are actually the absence of spacetime in the core of a quantized vortex, everything is inverted compared to what they've indoctrinated you in school into this CotBP - Cult of the Bumping Particles.
What ACTUALLY happens in a double-slit experiment: vortices are being sent towards the double slit. Since these vortices consist of oscillating space-quanta, theses vortices pulsate as well and send a pilot wave into the aether aka spacetime fluid surrounding it. Now when this pulsating vortex is passing through one of the slits, its pilot wave is passing through BOTH slits and interacting with itself, creating the wave interference pattern. Of course - the pilot wave interacts as well with the vortex - hence creating the wave interference pattern on the detector.
Wasn't that difficult to understand - was it?
Quantum mechanics should be replaced by deBroglie - Bohmian mechanics. A fully deterministic variant of Quantum Mechanics.
VERITASIUM is one of the best channels created by a human - he visualized the correct (although dimensionally reduced) explanation for the double-slit experiment perfectly. Just imagine this happening in a compressible, quantized superfluid in 3D where the walker-droplet is replaced by an in diameter oscillating toroidal vortex within the fluid: