I am not a scientist and Einstein is way beyond me, but consider another approach to the concept of time:
Does time exist or is it just an invention of mankind? If we had no way of measuring time would time exist? If we had no memory would time exist? If we had no written histories would time exist? Does an animal have any concept of time other than the seasons, night and day and coming into heat? Does any creature on earth other than man have any concept of time? If man ceased to exist would time cease to exist? Did time exist before mankind invented it?
Is there a beginning and an ending? Is the reality not one of constant change, growth and decay and growth again. Instead of linear time stretching from A (the Big Bang) to B (collapse of the universe) consider timeless, cyclical, spiralling growth and perpetual motion. What came before the Big Bang and what might come after the collapse of the universe? Nothing? Then surely time will not exist either.