Sure, you've got all those fancy "reaction" buttons now on Facebook. But there's one big thing everybody wanted that's still not there: the 'Dislike' button. But there's an explanation, straight from the mouth of Mark Zuckerberg.
The Independent published a quote by Facebook's creator that sheds light on why the guy didn't just make a "dislike" button rather than all these "reaction" buttons. The comment the recent Facebook announcement of the "reactions" reads as follows:
"Not every moment you want to share is happy, Sometimes you want to share something sad or frustrating. Our community has been asking for a dislike button for years, but not because people want to tell friends they don't like their posts. People wanted to express empathy and make it comfortable to share a wider range of emotions."
It seems like Zuckerberg is saying that these "reaction" buttons better address the needs of Facebook users than a "dislike" button because they express "a wider range of emotions." And certainly the "sad" and "angry" reactions can be used just like a "dislike." In summary, "reactions" are what the people wanted, and then some.