He didn’t disappear without a trace—he’s still watching F95 all the time. He just doesn’t post in the thread anymore, which probably means the story hit a bit too close to home. One can guess he might’ve included some autobiographical elements, and it ended up cutting too deep.
Or maybe he simply gave up on the story because he lost heart for it. Still, he brought the plot to a kind of small finale—and for that, he deserves credit. He didn’t abandon the game in total disarray.
If you’re looking for something similar, I recommend My Husband Boss.