> Enough people didn't understand it even with C

Yeah that's a good point, and perhaps explains why C was added in the first place.

I was going to say that B also shows the literal protagonist not really understanding it either, however now I think about it that reading doesn't track because as a player you've only been able to see one point of view at each branch along the way, so the other experiences are still happening in the background, just not observed by you.

> C is not the salvation we may think

I agree, and in fact the way C is presented in that moment (and maybe described throughout, it's been a while since I played through the game) also implies a 'nice' closure, or a victory that, like you say, doesn't really exist, on top of taking player's minds away from B.

I guess B is the more obvious existential horror, C is one you have to question a bit before it starts to feel wrong.