That K/D doesn't determine skill level. For all you know he/she dont even take the crucible seriously.
But to entertain your silly logic....the reason people with low K/D get to the lighthouse more than you is beacuse they do a blood ritual and sacrifice 100 goldfishes before they play...you should try it.
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What's your determination of skill? Because with your logic, anyone with a poor kd just doesn't take the crucible seriously and its not that they have low skill.