Sometimes it happens to me. Last week I was averaging almost 4.0 kdr a match. But then by Friday I could tell I was getting matched with people who are clearly above me. I didn't mind the challenge, but any mistakes resulted in quick death, and so I would go 1-3 matches of. 5-1, and then 3-5 matches of 1.5-2.5. Either way, my overall KDR improved to 1.3 (which took MONTHS ), but yeah, I can feel the variation as well.