Though clownfish AHOYBRAUSE is the one who will become rich when he loses 0,5% of every bet amount! 
I don't think he ever said this. Nobody thinks this, and if you don't like the concept of a house edge then you shouldn't be playing blackjack. But I also realize you are just trolling. I honestly can't believe attacking casinos with such easily disprovable fud was ever actually a profitable endeavor. Seems like a ridiculous waste of time on planet earth. Sure, there's a lot of shady casinos out there, but you should be attacking actual fraud, not based around your reimagined definition of house edge.
For example, its impossible to take this seriously:
The advertised house edge for the Stake in-house Black Jack is 0,5%, which means longterm I will lose 0,5% of all bets placed.
That's incorrect.
That is 100% correct!
If I placed 5 x 100 USD, then I statistically will lose 5 x 0,5% from 100 USD = 2,5% from 500 USD = 12,5 USD.
You are still equating "bets placed" with "bet amount returned", assuming an equal payout for each win, and an equal amount lost for each loss. Because Blackjacks pay 2-to-1, it is likely that the # of losing bets will be greater than 0.5%, because Blackjacks pay double but only count as one bet.
Also claims like this:
Problem is that I lost 10 times more than the advertised 50,25% losing percentage = 52,3% losing percentage!
180,900 bets is indeed a good size to prove rigged games!
180,900 bets is indeed a good size to prove rigged games!
As your screenshot is, no one but Stake to verify this is your account, and that the numbers displayed on the screen aren't altered.