From what I've read, he has almost completed chapter 4, which is allegedly larger than the first 3 chapters combined. That's A LOT of content, especially considering he's working on this all alone: and coding the whole thing, rather than rendering some 3D pictures and animations to shove in renpy as most visual novels do (which is quite some work too, I'm sure, but definitely not the same thing). Not sure if/when it will become available (I'm not one of the patreon supporters) but I'm sure we'll hear news soon.
I'd say let's cut the guy some slack: the first three chapters were VERY long, and he gave the whole thing for free. All the money he's getting, he deserved.