Tonythegator: Consider your own record. You have reached level 101 but have played only 450 ranked rounds. It would seem that you will be stuck at the Legend tier for some time since you seem to seldom play ranked rounds. (The 2406 alternate shot rounds that you have played have no affect on your tier.)
Perhaps the player you are concerned with has done as you have but at a lower tier. There are many ways to slow tier progression, but none to stop level progress other than not playing.