Solo queue as a Diamond 2, get two unplaced peeps and a Gold 1.. Que?
You know, that wouldn't be a problem if those people actually had the MMR/CSR of a Diamond player, but I kooked at your game history and the Gold player did worse than the 2 unplaced guys. It's pretty interesting that on the other team you also had an unplaced player, who completed 1 placement match. How do people get put into Diamond matches after 1 placement match (assuming he wasn't playing with a friend)? Even your teammates with 2 and 3 placement matches shouldn't be put into Diamond matches just yet.
Ranking system really needs more tweaking, especially since all the player are getting placed into Onyx after 10 placement matches. There is no way the system can know that you deserve the 2nd highest rank after 10 placement matches. SWAT suffers from that problem a lot, from what I have seen. Didn't we even have a guy who won 2/10 placement matches and was placed Onyx in SWAT?