I'm really sorry this happened to you but the creator did specify disturbing imagery at the beginning of the game! I'll admit, the genre isn't for everyone but the shock horror was intentional on the creators part :(
The fact that she used suicide as "shock horror" is one of the things people are bothered by.
"Disturbing imagery" also doesn't prepare people for the character you're romancing in game to very suddenly and visually hang himself with no prior buildup or warning, or for your character to murder him out of the blue.