Thanks for replying!
I'd like to make it clear that I don't find the ending bad, maybe disappointing wasn't the right word, unexpected might've been better? The ending does give the message that you wanted to deliver, I lied when saying that there's "no progression", there is some, even though it's very little and that's what I take issue in.
I feel like this game's story suffers a bit from the game's genre as you pointed out in .2, you don't get enough time to understand and know the main character due to you being sent straight to the bosses, so maybe you could've told something about the character through environmental story-building? I don't know if that would work, just giving some ideas.
The ending doesn't need to be happy or sad, maybe it could've been currently it just feels neutral if you get what I mean, while the main character does get some development, it doesn't feel like enough for the reader know how they'll end up in the future, all we know is that he'll figure out it later, that while is realistic, and does make sense given you don't just figure out things out of nowhere and so quickly, I think given the context of this being a game (which isn't supposed to be realistic), the could've been a bit more improvement, it doesn't need to be like an answer to all his problems, as that doesn't exist, but something.
Sorry for not responding to everything, I just woke up lmfao, also sorry if I'm saying bs.