If they have provably fair, no.
Although, I'd be suspicious of every single website you use. Don't just believe the provably fair, test it out.
Sometimes people are not looking at the gambling industry from the other side. They tend to blame the casino for every loss while in reality it was just their luck.
Absolutely,they were blaming the gambling sites for their loss,they even know that they can't win all the times but they were still accusing them later for their loss,but we can't change that this is the human nature.
If games were reach then why the sites allows the high rolls to win,I saw there were lot of big rewards also win in the gambling sites.