many times i doubted the provably fair system, that these casinos are cheating me, but what can i do
You can do many things if this thing you're saying happens to be true, why should you remain loyal to a casino scamming you, it's not by force choosing them, it's rather by choice, you can choose to stay or leave at any time, we have alot of casinos both new and old interested in making new gamblers have suitable experience with them.
This i may not agree, it's plain and fair, you gamble to win or loose, you can try betting at any settings aside from the common casino gambling, except if you already fall the hands of the scammed ones, i also don't believe in whatever i read online or watch because everyone at the end is after his own interest in everything they do.