Basically the title. I have been stuck in diamond 5 for most of the series. The second I get 2 stars on the riser, I start matching in exclusively with crystal tier players (frequently matched against top 10 players in my data center!) and I get hard stomped. Then I fall down and get close to de ranking to platinum and I match against platinum players that I then stomp. Surely it can't be too difficult to match me in with only diamond players. I've tried matching at all times of the day and nothing seems to work.