Oh you're in diamond 4

You see, Master and Predator Lobbies have a very VERY low player rate. There arent many people in those ranks. And not many of them play at the same time.

In master I queue for maybe 10-20 minutes to find a game sometimes (30 minutes if i get that unready bug constantly) 

If master and preds weren't able to play in diamond lobbies they would never find a game. When you ready up its stuck on like 6 players in Queue for a while.

You have to also remember, If you are playing to climb rank and complaining that you are running into players of a higher rank, then you clearly dont think you are as good as them and should stay in the that rank.