1.He may not seem offensive to you,as you have never made a map,nevermind a good and big one,but constantly bragging and promoting the maps he has stolen from other mapmakers that have put loads of time and effort into their maps is certainly offensive to me.
2.Arrogance is sickening
5.Copying maps without the permission of the mapmaker and claiming it is your own work should definitely not be tolerated and should be(in my humble opinion) suspension worthy
7.Refer to 1
About that part where you say he is no longer chaeting the map system,take a look at this thread that was hidden because so many people downvoted it due to the obviously stolen map:https://www.warlight.net/Forum/175822-east-mediterranean-map-made-fissel-adduti