I did read the whole article, and that doesn't excuse the BS clickbait title of "Facebook deliberately made people sad."
I find the fact that the article is complaining about emotional manipulation by Facebook, while using a deliberately manipulative title, to be more than a tad ironic.
Further, the article you link appears to have commentary by a single researcher.
Here’s a writeup by researcher who thinks it wasn’t unethical at all and that it would have passed IRB as performed. It, of course, does not end the discussion, but it does demonstrate that the issue is more complex than a company deliberately making people sad:
https://hbr.org/2014/07/were-okcupids-and-facebooks-experime...
[1] https://www.washingtonpost.com/lifestyle/media/media-values-...
And "the journalist is relaying" is a poor excuse - the journalist has a choice of what to relay and how to frame it, and this choice is routinely used to frame things in a specific way. There's no "just reporting" anymore, if there ever was. There's always a reason why something is reported (or not reported, as it happens) and there's always a reason why something is reported in a specific way. The choice and control is always on the press's side.
> "Please don't comment on whether someone read an article. "Did you even read the article? It mentions that" can be shortened to "The article mentions that.""
[1] https://www.theguardian.com/technology/2014/jun/30/facebook-...