Lost 2.3 btc , doesn't really seems to be "trusted" c.c
more like rigged

Let me guess you were using the martingale method and lost about 10 times in a row?
Use martingale method you have chance to win 50% and lose 50%, and with many money he have i think too he use martingale method
Even with a BR like that can't give assurance to make lots of money, he can still lose that in just a blink of an eye.