Multiple times in the past few days I've run into 5 stacks that will afk and surrender at round 5. Has anyone else experienced this? Does anyone know why they are doing this?

I cannot adjust my crosshair to enemies head . I practice , I try but it just doesn't happen for me . What should I do? I practiced more and have played more than all my friends but if they just jumped in a game after a pretty long break st...