He probably did. But the emotions that can lead to suicide tend to arrive like a flash flood, so overwhelming that there is no room for any rational thought process, the whole self is swamped and overwhelmed, and the emotions are so intense and entire that the self becomes totally focused on making them end. Suicide is not about wanting death in these tragedies, but about wanting that pain to end when it has become unbearable. Suicide can then become a spur of the moment decision and act. The method suggests that it was like this for him, there is no evidence of any advance planning, at least that I am aware of. He probably just wanted the pain to end
And we all know why people in that degree of pain don't reach out - because of the judgments people so readily make: you are weak, you are cowardly, you lack moral backbone, you just want attention, you are a drama queen, other people have it much worse than you, you are selfish, you are ungrateful, you have so much to live for you should....
Until society is willing to engage in honest and non-jugmental dialogue about suicide instead of judging and blaming the victim, these absolute tragedies will continue. Western first world cultures are incredibly immature and hypocritical in this respect.
And no cultural leadership for change is coming from the "suicide industry" - all the counselers, researchers, mental health professionals, crisis teams, "experts", doctors, psychiatrists. There are vested interests here, I am sad to say, which are quite happy for the status quo to continue as it has always done.
Robin Williams' death is absolutely tragic, though ultimately he was a very brave man, who lived on and off with appalling suffering for decaded which he must have experienced in the isolation of a very lonely place. He tried to numb the pain with alcohol and cocaine.
No doubt he was negatively and moralistically judged for that, too.
I was very close to a very successful man and talented man who committed suicide, many years ago. Perhaps closer to him than anyone else. And his mother asked me, "Whose fault was this?" I answered: "You want to know who killed him really? We all did, every one of us". Like Robin Williams, the burden of manic depression and alcoholism became too much and too hard for him to bear anymore, and we didn't want to acknowledge the degree of pain he was in - not even those of us who loved him the most.