problem is u dont know who rage quits. And i speak because of my connections issues i always get disconnected or booted out not cause i quit but because its outta of my control
Sometimes it's genuine connection issues, but you can usually tell when that's going to happen when players start teleporting around the stage or run into walls for several seconds.
But the majority of the time in ranked matches it's rage quitting, you start to notice that when a player does poorly he just stops moving as he's paused the game to select the "Quit" option, and the game cancels shortly thereafter. A nice thing to do would be giving at least one or two belt points to everyone left behind, even to the guy that died seven times, just so it feels like their time wasn't wasted.