I believe something fishy went on with this author.
His first work, was cancelled after 27 chapters. That doesn't seem too unusual. It does say volumes about the general public, if something of this quality wasn't well received, but it's happened before.
But the other two were cancelled after 11 and 17 chapters. That's way too soon even for the sales figures to come in and justify the axe.
Maybe there were office politics involved? Perhaps someone didn't want him being published, while someone else pushed to keep him in print.
That would explain burnout and his twitter silence since 2018.
Just a thought.