5 premade against 5 randoms.

So I and my friend were just matched against 5 premade. It wasn't even like 10 min wait and then the match, but a normal 2 and half minutes wait for a normal draft, and then we were assigned. It was I and my friend premade, and then top and jungle premade, and support was solo.

None of these make any sense. I would understand this if it was like 10-minute wait and like 4 premade and then 1 random, but this all was so mixed up, and riot promised that 5 premades would be placed against 5 premade. It was a typical silver game, you can obviously guess which team won. 5 premade has LITTLE better communication than a random silver team.