Air pressure is gone, stuck in a Monaco Dynasty

IMO, the "Judgmental Comments" were not out of line. The reason is safety. A learning curve on the mechanical aspects/coach maintenance is reasonable. A learning curve (i.e. one does not know how their brakes work) is NOT reasonable.

Without a working knowledge of how the coach brakes work, safety could become an issue.

And in most states, to legally drive a larger coach requires a different driver's license that requires passing a "how do air brakes work" test.