Thats exactly the point that really bugs me is there are plenty of answers for karlach to be saved and even if they wanted to keep it as something that cant be fixed give me an option to go to Avernus and actually try. I mean Raphael's is always an option as far as i know so the reasoning for her not being able to stay there doesn't make sense either. Personally though as someone who has a heart condition i play games like these to escape the world and be happy that doesnt really work out when my favorite character is told too bad so sad you either die or give up your soul. That to me is just way too depressing to take as a "deserved" ending.
