Why does I lose ELO and get Ranked Queue banned for quitting a game where a teammate fails to join?

Scenario:

> 4v4 game.

> One of my teammates fail to join when the game starts and instantly is resigned.

> I don't want to play a 3v4 game so I resign when I see this.

> I lose ELO and get ranked queue banned for 30 minutes.

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Why not discredit a game for ELO when someone fails to join and why the hell punish the teammates of the player who failed to join with a queue ban? This game's ranked system does not make sense in the slightest, no other game I've played with a ranked system would do this if there was an issue at the start of a game, look at Dota's ranked if you need an example of this.

Also while I'm here, why does EVERYONE in the game lose ELO if "Microsoft Services Failed To Connect" when a game starts? God it's so annoying.