Review Detail of Fertu in Magical Marvel (HP X MCU)

I loved this story at first, but it's been painful to read for the last 50 chapters (from Court of Shadows plot and later). Author kinda forces heartbreaking plot in your face no matter what. I don't know what's the endgame in all of that, but it's annoying to read about constant betrayals, MC suddenly losing her humanity, etc etc. If she is an unfeeling machine and has no one to live for now, why is she fighting in the first place? Since she wants to die and doesn't have anyone left to care for, why not just kill herself? Anyway, story suddenly got too f*cking depressing and I can't read it anymore.