It is normal. You just had a bad luck. The house has always an edge and in crypto games is 0.8% however that doesn't mean you will lose maximum 0.8% of the amount you are playing. In gambling there is variance which can be very negative or very positive and after a lot of plays with variance the house take a 0.8% profit from all the bets together. You can be very lucky or very unlucky in dice, its more than normal but I can understand how you feel after losing 14 times in a row.