Well this was a dumpsterfire to read. And very informative. I felt like there had to be more to the circumstances behind WNM's ceased development, so I'm glad that this came to light when Alex tried shutting another game down.
So with this we can confirm that Alex has gone from "jealously guarding his game", to "jealously guarding the entire concept of the game so nobody else is allowed to make one". But that's not how game development works; Alex doesn't get the monopolise the concept of a game just because he was the first to make a game with it - Copyright does not extend to the idea of a game, or how it's played. This very simple fact is why there's so many goddamn Battle Royales saturating the market right now. Did he conveniently forget that he himself has admitted that Yandere Simulator is an arsebaby of Persona and Hitman, based around an anime trope? His individual concepts are not unique either, so he has no legal right to force other projects to close down based on them copying his concepts. He had a case with Lovesick regarding the assets, but he dropped that within a day.
His year-long stay inside the four walls of his house has made him go a bit batshit, I think.