This is the most annoying thing but basically when your in a squad fill and a player quits its 3 vs 4 in most cases. This makes the game more difficult and unfair because someone died and quit before you could even get the reboot card.
Epic should know if someone has pressed start and quit the game.
Just do a simple 5minute ban then increase += 5 minutes upto 1hour this will stop people quitting.
In most cases the playing quitting will just launch another game and the players in the current active game will be at a disadvantage