People saying 50% winrate Solo and DQ would mean that it's fine
are missing the point! Even if queueing with more people has ZERO advantage, it represents a different skillset and game state. A ladder is supposed to provide a CONSISTENT and COMPARABLE game state for all participants. Otherwise, it fails to fulfill the basic premise of a ranked system: to be able to compare players.
I gave more details here.
This post is inspired by the discussion on Reddit here, where some were suggesting that 50% winrate for DQ compared to Solo would mean that the whining makes no sense. I don't have a Reddit account so I'm posting here.