When I said object-space-time is a system I mean they are not found separately. Except for in the mind as a concept objects can be separated out from space and time. This is true true of space and time as well – for only in the mind as concepts can this be done. In reality itself this is impossible.
Try removing something you dislike from the reality, and you will find that ignoring it is not the same thing as it doesn’t exist in this reality.