Some casino may seems to be genuine but their conducts may make them appear cheaters to their users. Because every users will always want a casino to run in a particular way to suit their peculiar interest. Moreover, there is no casino who are 100% pure, they manipulate things to make gains, to me this casinos are genuine. But some of them are greedy to the extend of scamming their users completely.
Casinos are built to make the owners rich and not the gamblers and they will do anything in their power to make that possible, They cheat a lot and i am certain most of the games there with the exception of dice which i believe is based on pure luck is sabotaged.
I think it really depends on the venue in question. If there's a casino at a location without regulations and regular check-ups, it's possible that the games could be rigged.
But in decent casino's, the 'rigging' is just done by math, they have a positive house edge on the games and automatically make money over the long term.
Online provably fair casinos are a different story, they are 100% fair if they've implemented a correct provably fair system.
There are many casinos that also have other games than dice that are provably fair.