As an aside, I find it interesting that you're Gold 1v1 and Bronze 2v2. I'm Silver 1v1 and Gold 2v2. I'm not convinced the ranking system for 2v2 and above works very well.
Well, I'm 2v2 Bronze in a specific team with a friend (we ranked a few months back and haven't played much together.) On 2v2 Random, I'm also Gold.
But I do agree that ranking for larger teams is poor - for example, I'm 3v3 Platinum, and I'm definitely out of my league - I think I ranked their as a result of being lucky in terms of getting good team mates.