Losing MMR when you have a leaver on the team

why is do i lose mmr when im put up against a 2v3? there needs to be some kind of leaver protection system in place. dont you agree


leaver should lose points as a penalty (not sure how much he loses) and mates should not (or only a low portion like 25%)
if the guy leave early (1st min) or due to connection issues canā€™t join the game, a remake mechanism should occur

losing points (even 8 or 10) feels hella bad due to a leaver. since there isnt co-op modes for ranked i cant see how this can be abused like other games.