As the title says, since we have a small group who like to rage quit or attempt to ruin the game for others. Instead of letting them exit the match, make them spectate when they try to leave. Leave their character standing motionless, easy prey for FT/Pred/A.I.
Make them sit though the whole match they tried to ruin :). And if they turn their game off or reset their device to try workaround it, put them straight back into spectator mode in the same match till its offically ends.
It won’t bother us regular players. Even if we have to quit for genuine reasons. Its a few mins of waiting for us. But hours for quitters who do it regularly.