I am so sorry for everyone who has experienced this. The loss of someone you love is hard enough, and then the people who are closest to you let you down, and so many people do not realise the devastation caused.
When my ds died, our whole lives ended too. I feel as if we are in a living hell. Whilst ds was fighting for his life in ICU, my sister, mum and dad told my extended family members, most of whom I hadn't spoken to in years, that he had actually died. I suddenly started receiving premature condolence messages. My niece even announced it on social media (with ds's premature date of passing) which made it extremely traumatic for my other dc too. When I later called my sister, mum and dad out on it, they denied it (it could not have been anyone else), and said ds's death was because I had not brought up my dc in the Catholic faith seriously enough and that I had always been distant with them. My Dad thinks my ds brought shame on his family as my ds sadly took his life. They believe they did nothing wrong, and I daresay have a narrative where I am to blame as I don't speak to them anymore. They like to present themselves as fine upstanding members of the Church community too! Sadly a lot of our other extended family members are also silent. Luckily our friends are so much more supportive.
DH is a shell of who he used to be. He feels guilty if he ever feels happy about anything, goes out etc. He is acutely anxious over everything and if our other dc go out for the evening we can't sleep. We can only get off to sleep with the TV on. Our other dc struggle with sleep too. We all suffer from PTSD. My other dc have all suffered sadly too. Their education has taken a nose dive and relationships for them are tricky. Our confidence and self esteem in most things is at rock bottom. DD will crumble easily when any minor thing goes wrong.
I don't think a lot of people can cope with the pain. The only silver lining is that the people who do stick around are honestly worth their weight in gold. You truly and honestly find out what people are really like and how genuine they are. Whilst I have lost my extended family and some friends too, I do feel lucky to have the amazing network of friends that are still here and also realise people for what they truly are.