No teamates remaining, still recieves a penalty.

To avoid any confusion, even if you start the game down a squad member or two, quitting a ranked match will result in a penalty. We're seeing feedback around this and will be sure to ping it to the team. I feel your pain though...have been playing a lot of Shadowfall and decided to jump into a ranked match. First match I was all by myself and unfortunately placed 2nd after playing defensive the entire game. So close!