Two comedians I was absolutely zero surprised to hear struggled with depression were Williams and Jim Carrey.

I had to watch Bruce almighty every year at ski camp (look, they only had the one movie) and because it made me sad every time I spent every year trying to figure out why I so disliked his physical humour. I related, but I related in the "I can see the pain beneath and I dont want to" way.

Not to shit on either of them, I adore them both in serious roles, but their comedy movies are often downers to me.