The suicide is tragic and I don't doubt that media can have a causal role in pushing someone into despair and depression.
However, we seem to react very differently depending on the type of media. I have no doubt that there are people who enter depressive spirals reading about horrible tragedies in the newspaper everyday or consuming books from the library about horrible events like the holocaust. Yet, when such tragedies occur, we don't lay the blame at the feed of the library or newspaper even though it might be true that in an earlier age they wouldn't have had to deal with that kind of troubling content. Hell, the content doesn't even need to be troubling, novels, (and especially air-conditioning) make it more appealing to be socially reclusive.
We tend to treat whatever kind of media that's seen as new or scary differently than established parts of our media eco-system. When novels, newspapers or (now) TV and comic books play a role in someone's depression we tend to regard them as just the background of modern life. But we saw concerns about comic books when they were new, gangster rap when it was new etc.. etc.. and now we are seeing concerns about social media.
True, social media is a bigger change than a new kind of edgy music but people (really!!) warned about the harms of the written word and widespread literacy as well. And yes, we may have to learn how best to integrate social media into our lives just like we learned with all sorts of other media innovations but it never really helps when we treat the latest media innovation so differently than our existing media in terms of scare mongering and assigning blame.