That's what he is trying to do. His goal is to get back the money that he gambled away. His issue isn't that Bitz allowed him to play. It's that he lost. And because he lost, he wants his money back.
That’s pretty obvious.
If he really cared about how the TOS wasn’t properly implemented, he could’ve acted on it earlier and called the casino’s attention not only when he lost money.
What it looks like instead is spotting a loophole and using it against the casino only after losing, which honestly feels more like blackmail. Hopefully other casinos take note of scenarios like this, where a user suddenly questions the rules about who’s allowed to play only when things don’t go their way.
I’ll stop here, but personally, I don’t support this kind of behavior.