Please recommend me a psychological drama where the MC slowly spirals into insanity or a state of mental instability throughout the course of the show. I would prefer that it'd be a slow burn where we're gradually shown the cracks in the MCs psyche throughout the drama. Not really one where the MC has some sort of sudden drastic 180 degree personality change.
I've started Mouse (on episode 18), though what I personally didn't like about the show was the reveal that the ML was the big bad psychopath villain all along (still an absolutely phenomenal show btw). I LOVED Strangers from Hell because while the ML was mentally unstable from the beginning, the progression of the character's madness was extremely interesting to watch.
I'll also take any recommendations of descent into darkness as well. Where the MC doesn't necessarily have to go insane but they start off as a generally good person at the beginning of the story and end as an evil or morally dark character.
I don't like comedy and romance but I'll tolerate it if it fits.
Thank you in advance.