Brazil had stirred controversy when he said he did not have a lot of sympathy towards the late comedian for committing suicide. Williams, who died at the age of 63 last week, was struggling with depression.
Fletcher, 29, spoke about his own battle with depression on his website Tomplicated.Com.
"Sometimes ... Alan, the storms come. I'm not talking about a light shower, I mean the full works. The darkest skies you have ever seen ... It's so completely consuming that it is suddenly not only the only thing you know but the only thing you have ever known.
"You are in too deep, what's the point in even trying to get out. Alan, it's as though no one understands," he said in his long post.