I'd like to put out there, while his post isn't fleshed out at all and just comes across as raging, there is a legitimate complaint about the premade thing. It sucks to be in a ranked game and to be the oddman out of a 4 man group.
And it sucks for those groups as well honestly. With the removal the ranked teams, I actually don't want to play with my friends in ranked any more because it will effect my personal rating. Before I could queue with 3 people who were below my level, and one who is slightly better than me, but we'd all have fun working on improving our team rating. Now we don't do that any more which sucks.