Okay, so I keep seeing reoccurring people in the comments just saying how they hate Heiner, and hate how Annette is around him, despite understanding his character.
If so, then why are you still here? You have said you don't like him even after acknowledging the morally grey side to this story. You have said you know they will end up together in the end, which makes you hate him even more. If you hate the male lead so much that he makes your blood boil, you know he's end game, and you don't like where the story is going, WHY ARE YOU STILL READING?
Like, I get the whole, you are allowed to say when you don't like a piece of media, but you HAVE said it ALREADY. Yet you still come back? For what purpose? This story isn't going to change to your whims, so why keep trying?
Also, on the topic of Annette's suicide attempts and depression, Heiner was not the sole reason. Ya, he was a terrible to her, and emotional neglected her, which contributed significantly. But HE was NOT the CAUSE. Heiner did not kill Annettes father and strip her of her nobility. HER COUNTRY DID. Why are people forgetting about the entire country who suffered because of Annette and her family's privilege. THEY continued to scorn and protest her existence. THEY screamed at the gates of Heiner's house. THEY shot her, causing her miscarriage. If Heiner had divorced her immediately, when the aftermath of the rebellion was still fresh, I shudder to think about what might have happened to her.
So, either say your piece and leave, or just admit that you enjoy this story. Annette is doing what she wants right now. SHE said that she wants to dedicate her life to understanding other people, this includes Heiner. She WANTS (and is trying) to understand him. Why can't you understand HER? (Even Heiner is trying to understand her more than you are....)