I definitely agree it's unintuitive to the layman. We never have to deal with large scale wave interactions, on the classical physics level. I disagree, however, that we can't understand it. It does make sense, it just doesn't map to our default particle mindset.

I disagree that it breaks the laws of physics though. It just shows some flaws in our methodology. E.g. the speed of light isn't a limit on fundamental speed, but of information. It just happens that the only time we can have transmission without information is via decoherence.

QM is definitely incomplete. We know the what, but not the why. That applies to most of physics however. Newtonian physics is the same. We know what happens, but not why. It's just that Newtonian physics is intuitive to our savannah running brain, while QM requires more mental work.