Seems there's a couple of things in play here wrt Calibre.
If there are legitimate issues/problems this is a great place to bring them up, discuss them and potentially get resolution given that the creator is right here!
If there are differences of OPINION as to how something should work, that's a different thing and certainly fair game in an open forum, but if it is continually thumped on, that is just bad manners. You know the old saying -- "Don't look a gift horse in the mouth."
