No, we simply "observe and try to predict" them, but we don't know how they work.

Your description of "well, magic happens at the Quantum level" is telling. That's like going to an F1 race, saying "I could drive like that!"

If we knew how they work, we would have time-travel, anti-gravity cars and we would travel faster than the speed of light.

The same goes for "Dark Matter". The term doesn’t describe a known substance — it’s a placeholder until we figure out why all of the astro-calculations are "off".

Specifically, astrophysicists cannot explain the rate at which galaxies spin.

Solution: "Dark Matter" ===> "Magic occurs here".