I hate to say it, but if you apply Occam's Razor to Quantum Mechanics you wind up throwing out 90% of Quantum Mechanics. That's because Quantum Mechanics is far too complicated to be the "simple solution" that Occam's Razor is looking for.
A far simpler explanation for small-scale physics is Paul LaViolette's Sub-Quanum Kinetics. If you are truly applying Occam's Razor, than the inevitable conclusion is that Quantum Mechanics is wrong and SQK is right.
But of course people are far too accepting of things like the Copenhagen Interpretation to consider a fresh approach.
If someone asks me nicely I'll post a summary of SQK.
"OK, can you kindly provide a more detailed explanation of SQK as an addendum to your answer? That'd be really helpful. – Dvij D.C."
How could I refuse such a polite request? Okay, here it is. But first a disclaimer and some links:
I personally am not attempting to claim SQK is the right theory, just that it is another theory, and that by being simpler, it is more "Occamable" than QM.
LaViolette's book: https://www.amazon.com/Subquantum-Kinetics-Paul-LaViolette/dp/0964202573/ref=sr_1_4?dchild=1&keywords=paul+laviolette&qid=1591380871&s=books&sr=1-4
One of LaViolette's papers, as published in The International Journal Of General Systems: https://www.tandfonline.com/doi/abs/10.1080/03081078508934920?casa_token=vI8AdTnpSQoAAAAA%3ADmbRr0vVy3wWc3xIXIZjFj1GHHFakCU9BnwwOlqW-yzBM5S4veaxP1IHk8SuY1qbBjb6er0mC6Wt&
SUMMARY OF PAUL LAVIOLETTE'S THEORY OF SUB-QUANTUM KINETICS
as summarized by Jennifer Freeman
The Theory Of Sub-Quantum Kinetics holds that the entire universe (matter and energy) consists of 3 elementary particles called G, X, and Y; and a series of supporting elementaries including A, B, Z, and Omega (hereinafter referred to as O).
The A, B, Z, and O particles in themselves do not manifest the physical universe but are necessary to its creation; for as particles interact and transform themselves from one type to another all matter and energy come to exist.
If physical space is devoid of G, X, and Y particles, or if there's a uniform distribution of each of them throughout space, then there can be no matter or energy. Matter and energy can only exist when there is a nonuniform distribution of G, X, and Y. Fortunately, this is easy.
In LaViolette's "Model G" there are 5 primary reactions that occur among these particles:
A -> G
G -> X
B+X -> Y+Z
2X+Y -> 3X
Y -> O
Each arrow represents a probability that the inputs will spontaneously change to the outputs. (Each reaction can also occur in reverse, but these probabilities are much less.) As a result, these transitions are both continuing and nonuniform. This nonuniformity is the key to creation.
It is the supply of A and B particles that drives this whole process. These particles are seemingly inexhaustable. La Violette states that A particles come from A' particles transforming into A, and that A' particles come from A'' particles transforming into A', and so on ad infinitum. There is a similar infinite chain supplying B particles, and infinite disposal chains cleaning up the waste particles, O and Z:
... A'' -> A' -> A -> G -> X <----- Y -> O -> O' -> O'' ...
... B'' -> B' -> B ----------------==--------> Z -> Z' -> Z'' ...
One reaction listed above is the conversion of A into G. While A particles are essentially nonmaterial in the usual sense, a nonuniform distribution of G is what creates gravity. Thus a gravitational field can occur without any matter nearby, although it is unstable.
Quite possibly the first stable particle of matter was a proton. A proton consists of a dense concentration of Y, surrounded by a shell of X, surrounded by a shell of Y, surrounded by a shell of X, and so on. While the X's and Y's are particles, the pattern they form is wavelike, giving protons (and other subatomic particles) their wavelike characteristics.
Protons are quite stable, and they have mass, which means they create gravity fields of their own (due to the effect they have on nearby G particles). And gravity fields do encourage particles to remain stable, so the entire unit tends to be self-perpetuating.
Anti-protons, while possible, do not have the stability of protons and so decay quickly. Therefore, the universe is made up primarily of matter and not antimatter.
Protons and their associated gravity fields encourage other particles to form and remain stable. While a proton in no way "gives birth" to other particles, the zone of gravitic stability surrounding them does lead to additional creation.
An electromagnetic wave is nothing more than a periodic variation of X and Y in one place, nudging the same variation to occur in an adjacent place, and so on and so on, causing the wave to "travel".
Creation of matter and energy, in contradiction of the Laws Of Thermodynamics, continues today, and is most intense in areas of strongest gravity. Sub-Quantum Kinetics holds that there was no "big bang", the universe is not expanding, and that the red shift of light from distant galaxies is due to the light itself changing as it travels through the interstellar void (the "tired light" theory). It also says the universe is not "running down" because entropy can decrease as well as increase, that there is no black hole in the center of our galaxy (only a huge mass where a lot of creation is going on), and that there is no missing "dark matter".
Sub-Quantum Kinetics does not accept the Copenhagen interpretation of the Heisenberg Uncertainty Principle. That is to say, according to LaViolette every particle has a definite position and velocity, which is uncertain (to us) only because of our crude measuring tools. The process of observing an experiment does not cause it to manifest one way or another (although the way we observe it does influence what we can see).