He isn't. Adding up every players kills and deaths and then finding the kdr of that number is known as global kdr. Not average kdr. Average kdr is the average of each player's k/d ratios. So if we 1v1 each other and I get a 2.0 and you get a 0.5, the average kdr is 1.25 and the global kdr is of course 1.0.