I never watched Bourdain's shows or knew much about him other than a face and a name. But I just listened to his WTF interview from a few years back and got the impression he was a humble, highly intelligent person who was interested in the world beyond just food. It's a shame he killed himself. As has been said here people commit suicide for all kinds of reasons and it often doesn't make much sense.
Hopefully the media will do a better job covering this than they did with Robin Williams and it will result in people seeking help instead of another rash of copycat suicides:
https://www.washingtonpost.com/news/to-your-health/wp/2018/02/07/robin-williamss-suicide-was-followed-by-a-sharp-rise-in-copycat-deaths/