Did you thought that some casinos are cheating you or they don't give you enough percent of your money? I really think that there are many rooms and casinos like those. Got to be careful I guess
Once I was really pissed off by some guy who had best card all the time and he was playing with me. And finally when the round ended I was thinking that I got the game but he just got the best card. But also sometimes some poker service can give you softwares that have bugs in it so I'm really hate when that happens.