If you follow the bets / rolls, streaks and guide yourself from a probabily fair code check you will be able to verify your bets.
Try that in first place before assuming some Cassino is rigid / has fixed bets.
When it comes down to losing money in casino everyone thinks that the casino is rigged and they wont be able to win back their money. While mabye a few minutes back they were the same people who trusted that casino with all their money.
Its human nature to be self-centered and thus this happens with every liberty seeking person out there. They know that the casino's bets are provably fair but will continue harassing mods and support team with complaints which ultimately have zero effect.
I think fixed can only be possible in sports gambling, casinos has house edge so in the long run we will lose.
We should accept that reality that we are just burning our money if we play in casino, instead of longing to be profitable, just accept the reality and enjoy what you spend.
I think not all sports gambling can be consider as fixed. I am playing sports gambling for a long long time. even my more interest is in sports gambling, for most of the time I found sports gambling very fair and even make a lot of money from it. Therefore I do not think that sports gambling are always fixed.