Not really. What is tragic is that his "sever[e] depression/mental health issues " were due to cocaine, alcohol and godless liberalism. There are cures for all those things. That he didn't allow curative thoughts, self-discipline and healing actions to pierce his indulgent lifestyle and selfish death inflicted on his family? Not tragic: evil.
Not so sure on that. We may have a 'Chicken-n-egg' argument at play here.
Was he mental because of drugs, or did he take drugs in excess because he was mental?
I don't have the answer to that, perhaps you do.