Ok I read the guys post who said "just find a good team". Finding a "good team" is not the issue here, solo queue is. There are some simple modifications that can be added to solo queue ranked that would reduce the.. 'abuse' if you will.
An example of a simple solution off the top of my head:
Instant BAN for any afker/leaver in a ranked game - though as we all know a time comes for all of us when we have no choice but to abandon a game for something that holds priority over what is after all just a game, but I for one would gladly take the risk if it would mean all of the ABUSING leavers (rage quitters, trolls, etc.) would receive bans as well.