Czuch Czuckers: Nonsense. Use of the doubling cube is a skill in itself. It has the opposite affect you describe.
And another thing... you were 4-2 up in that match at the time, so complaining about lack of luck seems a little silly. Go and look at how you got the 4 points in the first place.
(hide) If you want to play a game with an opponent of a similar level, you can define a required BKR range for a new game invitation. Then nobody with a BKR outside this range will be able to see/accept it. (Katechka) (show all tips)