The wave is bent around the dark matter (quark gluon plasma in folded space/time),
Dark matter can not be a plasma because plasmas absorb and emit light. Dark matter does not.
but the particle will go through the dark matter, but will also leave our frame of reference, follow the particle through dark matter and its speed would not change, staying at c, but only relative to the the space it travels through, it would eventually pass through dark matter long after the wave as gone around.
You can not separate the wave function from a particle. The wave function describes the location of a particle. This is Quantum Mechanics 101.
And if 80-90% of universe is dark/matter there is alot of bending going on, so we should only see distorted images,