It is easy to understand why Einstein said time is an illusion, what I cant understand is why he didn't say that both space and time are illusions caused by the ratio of the speed of light. What we call the space-time continuum is IMO a misnomer, I believe the continuum consists of distance and time, and as we all know time and distances in space, can be stretched or compressed. so neither component of the continuum has fixed dimension. Its all relative !Entropy because of time might not be a thing.
If the concept of time is just a property of A to B in quantum fluctuations energy balance then time might not really exist.
Entropy might simply be the temp particle creation/destruction of Fluctuations degradation of everything from that activity.