Some user that goes by Zamii or something "apparently" got bullied into attempting suicide by the Steven Universe fandom.
I say "apparently" because she has a history of sending herself fake death threats, pretends to be a teenager even though she's twenty, and is friends with and supports a convicted pedophile (who goes by griddles or something). (Also, I haven't seen it myself, but people I know criticize her for undertones of fatphobia, pedophilia, racism, and transphobia in her artwork.)
The Steven Universe fandom is being blamed for her drawing Rose as skinny multiple times, I guess? And not for the all around criticisms of, well, everything I just said.
The shady part of this mostly comes from her side. There is a chance that she actually attempted suicide, yes, and I'm going to acknowledge that. (But actual suicide survivors have pointed out how odd she was acting by posting a video and barely talking about the process of what happened.) The problem is I barely got word of this from any side of the fandom, even on Tumblr. I've actually seen more posts shitting on the entire fandom than I have seen actually going towards that one user.
So, something on Tumblr that got blown out of proportion, like that Keystone Motel Yelp "incident"