Being mad about others taking superman stuff is pointless.Superman himself has taken things from Hugo danner,Zorro,Tarzan,John carter..etc.His entire gimmick nowaday is basically closer to that of cap marvel who was basically knight of the round table and saviour figure.All superman can do is create new stuff.The problem is not that others take from superman.But, superman is not in a position to give anymore.They need to start being creative.Have as many takes as possible.maybe one of them will be a bullseye.