I got angry after I realized, that is nearly impossible to get 13 reds on 1.25x payout.
Please do not fall for this type of thinking.
Almost impossible is not impossible. It's like saying that the probability of you winning the lottery is almost impossible.
You can get a jackpot, and you can get a loss streak. These events can happen with any frequency, even if they are statistically unlikely. Mathematically, the odds of getting 13 losses in a row with a 1.25x payout with a 0.5% edge is (0.204)
13, or 1 in 943,643,219.
Is this highly improbable? Certainly! But how can you say that it's impossible for this to happen twice? That would be arguing in bad faith.
All you need, by the way, is ONE example of when they fleeced you on the result to disprove their provable fairness - pick any bet from your loss streak and try to make sure that the server seed and client seed match the surrounding bets (i.e. they are the original pair you had) and the correct results.