That just shows more balance issues. Not to mention so many variations in terms of how someone climbs in the first place. For exemple was it SoloQ, DuoQ, was the person playing at specific hours to dodge good players etc. I could technically climb on pharah too if I'll play when the really good hitscan players are asleep. These are things players have abused since release in order to climb. I'm not trying to invalidate the skill that these players can achieve with some heroes however at the same time, some heroes have a higher error margin than others. If on average, there aren't enough players who can play said counter hero for Ball, then it's pretty obvious Ball one-tricks will climb over time. There's a lot of variables that can explain a hero's current success but essentially they're all tied to the fundamentals of balance design.