"They told us that Chapter 7 was already largely complete at least four months ago, yet it's still not out. "
That's simply false. We have never said that. I'm going to assume that you're not intentionally spreading misinformation and that you're just confusing us with another dev.
We have weekly reports for patrons and a daily progress tracker on our website/discord server/Patreon page.
I also think you don't understand the difference between supporting a project on Patreon (even for a month) and buying a game.
We are two people making the game, have had irl situations that have impacted the dev time, and the 0.7 has more words (translating into more dev time) than the previous two updates combined.
The sum of it is that if you want to play WaL! you will have to wait for as long as we decide it is necessary for us to complete the content planned, realize our vision for the story, and match the quality of the rest of the game. If that's too long for you (and it definitely seems like it), drop the game and forget about us. That would be better for you and even better for us.