I also hitted larger streaks and lost bigger sums without complaining. Last monday i lost 0.39 btc. Why i didnt complain? Because it was my fault, that i got too greedy and couldnt block 20 losses at 42 % winning chance. But i saw strange things with those losing streaks: Did no one of you saw, that if you hit big losing streaks the rolls get faster and faster on autobet?
The thing is: the script, thats used by bitsler, is still a piece of software.
i ever has 20 streaks loses too at 42% win chance (worse than you, i had 25+ streak loses on 49.95% win chance). Sorry for your loss, but it seems you were betting in long run which we know we'll ended busted because of house edge.
It goes faster and faster because larger bets have smaller delay! Read about bets and you will see that if you bet 1 satoshie you have a big delay between your bets because no site would resist to 1 million bets made with 1 satoshie!