Some of what you perceive as "getting hung up" may must be physicists trying to explain the oft misunderstood concept of entropy to people who have misconceptions about it.

That being said, there are still plenty of unanswered questions around time in physics. Even just open questions about block vs growing block universe are unanswered, and tied into the ultimate nature of time.

Also, we know that entropy was much lower in the past, but we don't know WHY.