I feel like you completely missed the point of the game, but that's ok because It took me two playthroughs to fully understand it myself and almost the whole game is a mindfuck and very metaphorical and uses a lot of subtle details. I'm pretty sure 95% of the game just takes place inside of Senua's mind and her delusions, that's why she always keeps quoting what Druth said "The most important battles are fought inside the mind" and what they keep referring to as "The darkness" is her mental illness, but being the fact it was during ancient times they thought it was some kind of curse because they wouldn't have the kind of medical knowledge we have now obviously. Also her father burned her mother at the stake for defying "the gods" and listening to the voices of "the underworld", so her mother clearly had psychosis as well.

The little feature documentary that came with the game shows how much research that went into the game. Ninja Theory really dug deep and took their time crafting this experience. The fact they actually went the extra mile and worked alongside patients who suffer from the illness and doctors who specialize in that field just proved how much this project meant to them. They didn't just make a mythological story and slap psychosis as the twist at the end

@Dragonflame1994
Yeah no, I understood all of that and I watched the dev diary thing. My point is, if you were to remove the character's psychosis from the game entirely, you would still have a perfectly normal dark fantasy story. That's why it feels slapped on even if it was intended from the beginning. If they wanted to make a game with the express purpose of generating empathy and understanding for those with psychosis, I think it would've been better for them to set their game in a more realistic setting, or remove the combat element, or hell, do literally anything to make it less video gamey. Instead they just put out dark and gritty trailers saying "TRAVERSE HELL" and "DEAL WITH MENTAL ILLNESS" with swordfights and shit happening, and now the trailer for the sequel is like "Oh look more dark and scary mythological stuff, and would you look at how creepy this song is, and how she contorts her face!" and do you get how exploitative that sounds?

If you want a longer and much better piece written by someone with mental illness critiquing the game, I'd recommend checking this out (also this piece points out that the game wasn't originally intended as a story about psychosis, which I had forgotten, but only goes to further my point): https://www.polygon.com/2017/9/15/16316014/hellblade-senuas-sacrifice-mental-illness