Do you really trust online bitcoin casinos you play at?
I think all lost in casino, except the owner.
Trust is not gained by the result you get from the casino but as what Rhavar said it is all about provably fairness where you can verify the outcome.
If all people thinks like you, I believe there will be no trusted casino because you will only trust a casino where you won some money.
Exactly what inside my mind for any kind of casino games, but Maybe if you ask trust about yours payment if you won some game it will be different story.