Quantum Mechanics explains what happens at the ridiculously small scales. The actual physics going on at that scale is so far removed from our daily observations and interactions with the universe that it's stupendously hard to make emotional sense of it.

This is what's going on here.

There are multiple interpretations of QM which are drastically different in concept. They are attempts to make psychological order appear in a universe of partially restricted randomness.

How can a thing exist equally (or unequally) in 2 states at once? How can a particle simultaneously have 2 different energies?

This kind of question makes our heads twitch. We want to exclaim, "This is a lie! The particle must have a single energy. Perhaps it's not clearly defined." However, the math does not support an unclearly defined energy, the math supports a simultaneity of energy states. Experiments bear out that it is a clearly defined property of particles to exist in multiple states.

So. The reality that is observed at this scale is at odds with our macroscopic reality. This drives people to come up with hand-waving explanations for why it is what it is... but the math already tells us what it is... it's just hard to accept and even harder to communicate without the math...

This makes interpretations which are approachable by laymen obtuse.

Ask yourself this:
If time is emergent... an illusion caused by some quirk of our human experience... What difference does it make?
What are the implications?
Any?