Yeah I've had simliar experiences: it was maybe 3-4 Iron Banners ago, joined a friend's group with 2 really low skill players (sometimes they would have 0.19-0.3 K/Ds in a match). So 4 solid average-ish players, 2 bad players- we went 12-1 and I averaged a K/D over 4. Was a ton of fun. Just before that, playing solo, I averaged a 0.6. And afterward, playing with a high skill player and a low skill player (fireteam of 3), averaged a 1.3 K/D.