Also I need to know, is there any chance of there being an even remotely happy/not horrifying ending to this VN?
There is chance, this is probably the last game in Echo universe and considering that Cam is psychic he can reveal all burden secrets (maybe we will finally get 100% answer if Chase killed Syd or was it smth else)
However it is very positive scenerio, I would expect that if they will try to safe Echo they will die or brake up, or If they'll leave This hellhole they will strengthen their bond