PvP scoring - confusing!

While PvP has seem some update in recent times, the scoring seems to be confusing at times. This is a screenshot of a guildmate’s PvP run.

Clearly, the guildmate (Ragequit) has more defense wins, fewer offense and defense losses compared to the higher ranked (Jimmy, nothing personal). Why is the score lesser for Ragequit?

As you can see, the scoring can vary depending on the fight chosen. Jimmy most likely did far right fights and RageQuit did mostly far left.