IMHO..... I think he was told the end was here. He's become so arrogant at winning that a lot of people have stopped watching and ratings have tanked. As well as some off camera comments he's made about Alex haven't sat so well with the network.
It was time for him to go, enough is enough...
The ratings tanked, huh?
https://www.thewrap.com/james-holzhauer-on-jeopardy-highest-ratings-in-4-years/