My heart breaks reading about this, he was always one of my favourite fighters for both his personality and fighting style, it was very difficult to watch his health decline and to witness his struggles with addiction. He just couldn't find peace after his athletic career, he had so much personality and talent, he really should have had a place in the UFC after his fighting career ended.
This is a harsh reality of fighting, these guys are literally sacrificing their lives. Bonnar may have had CTE which could have fueled his recent behaviour resulting in his physical decline to his death, Bonnar was a huge part of the UFC's success story, I hope they honour him in an upcoming event because the UFC owe a LOT to this man RIP.