Flex is amazing!
Our teams had solo rating: Platinum 5, Silver 3, Diamond 5, Gold 4, Diamond 5 vs Gold 4, Gold 5, Diamond 5, Diamond 5, Silver 1
In 5v5 rating it was: Unranked, Silver 2, Silver 3, Gold 5, Silver 1 vs Silver 2, Gold 5, Gold 4, Platinum 1, Silver 5
I don't know how this can be balanced with double rating system, and even then we had rating varying from Unranked to high Plat. Well, it's a mess. You can't understand - are you losing because you suck, or because enemies are 3 tiers above you.