[Nobody]

"Absolute rest is only realizable if and only if the total linear momentum of the Universe is zero. This can be proved by space-time quantum of square of energy."

I don't think Einstein failed, but like all other physicists considered only one monopolar singularity to form all relative frames.

Analogies aren't always accurate, but helpful to give a picture of what is being referred to. One that can be applied here I think is a solid pole (absolute frame) connecting two particles whereby any motion of one simultaneously and proportionately affects the other regardless of distance. Einstein et al. would consider this spooky because they thought in terms of effectual changes being propagated through waves in spacetime, not in terms all interactions being dependent upon and affecting all others.

All macroscopic objects and interactions being dependent upon an infinite number of monopoles, connects all microscopic objects at beyond c instead of c. So any interaction regardless of where the system is effects all other systems. Sort of like the butterfly effect, yet including the absolute frame. In other words, when you move, you immediately change the entire universe.