[viccis]

The entire concept of causality and entropy as something that happens in a linear progression at approximately the same rate is 100% a concept that is "made up" insofar as it is, as Kant would put it, the process of apprehending a sequence of sensibilities into a schematized understanding of the objects around us. Cause and effect are real (and don't require empirical understanding), but only viewing objects in the space around us as partial impressions that are contingent on that specific time is the "man made" part of subjectivity.

So a better way to put it is that time is real, but only as it relates to our perception. And that is always subjectively contingent. The concept of "time" outside of any subjective perception doesn't really make sense. Even if you're purely limiting it to "causality", then you're going to run into a host of issues if you think you can order causal interactions into a linear "time"line.