There's a difference between a description and an explanation. A description tells you what and how; an explanation, why.
When Newton described gravity, he explicitly avoided explaining it. The description was calculus, and it was spectacularly powerful. So powerful, it continued to describe other natural phenomenon long after his death. Magnetism, radiation, subatomic particles. But it never explained any of them.
Quantum mechanics makes both the most precise and accurate predictions in history. Its measurements are beyond question.
But the commonly accepted explanation, Copenhagen, is almost certainly wrong. There's a simpler explanation that makes all the same predictions. And everyone who's studied enough physics already knows about it, but they dismiss it because they find it philosophically distasteful.
If you can let go of the concept of free will, all of the mysterious voodoo of Copenhagen can go away too.
That's a tough one to let go of. When you go to order at a restaurant, the decision seems to spring up out of you with no source. In everyday life, it definitely feels like we have free will.
But things that feel right based on common sense have turned out to be wrong before. It feels like the sun goes around the earth – we still say "sunrise", not "earthturn". Newton invented physics to demonstrate that although uninitutive heliocentrism was almost certainly true. When experiments showed the speed of light didn't change based on the speed of the observer, Einstein let go of the common sense notion of absolute measurement.
Neuroscience increasingly agrees. The more we learn about the brain, the more it seems that decisions are made by the hardware alone. The feeling of being in control of the decision comes a split second later. We know taking our hand off a hot stove is not an act of free will, but we make two categories of intentional and un-. That assumption may be wrong.
Lots of people panic at the concept of being controlled by this determinism. But I think they forget the determinism is balanced by uncertainty. The future may already be written in stone, but we don't know what it is. And sometimes when we're most sure about how we think things are gonna go, we get the most surprised when they go a different way.
Let go of free will, and let uncertainty guide you.