You are confusing the relativity of perception with the relativity of measurable quantities.
time will exist if I believe it doesnt. time will exist if i believe it does. Two different shades of truth and established harmony might give a scientist and a theologist the same sense of self-satisfied complacence but that doesn't mean either of them they have found TRUTH let alone the same truth. The universe doesn't exist independent of us, just independent of our perception of the universe. Time would STILL exist if life never existed because the definition of time is not directly tied into people observing time. It is tied to experimental observations that people were able to record as a result of them being alive.
Everything is experimental. That is the bridge between your mind and the world.
You cannot escape time. You can forget about it.