I bought into the wierdness of quantum mechanics for a long time since I didn't have an alternative. Jeri is right that much of reality is locally happening at the same time. The math for QM can even be correct
while not being a true reality because only the point of view is what is changed but not the overall system.
   What is a workable alternative?? A better POV imo is that time is what is wierd and has several dimensions to it on smaller scales and on large galactic scales shinks to a singular value. Between small scale dimensional time and large absolute time there is a middle ground in which past, future and present are simultaneous depending upon direction and speed which can cut hundreds of years into te past as well as the future.
    Peering into the wierdness of space-time is what we are amazed and confused by on small scales and amazed and see more clearly on large scales. Locality and determinism becomes more understandable when we discover the non linear qualities of a time spectrum.

We will not have to change all of QM but merely see how it explained questions when we didn't know the true cause. An observer of a photon sized quantum strangeness may or may not be in the same time dimension. That seems much less wierd or strange to me, its only a matter of postion and not 'impossibility'.

The odds of my being correct about this is not the point but measuring
the nature of time having a 'thickness' as scales shrink is an experimental reality/