Jeeeeeesuuuuuuuussssss😭 Some sort of punishment or a short time out is definitely needed for players leaving early. Halo 5 has a decent time out system, where your time out increases the more you leave before the game ends. You had one in reach so please sort something out. I've come across people backing out mid game/after the first round in most of the comp games I've played, it's massively frustrating.