I know this will be downvoted, but I think it's worth noting a few points:

- All "reactions" were weighted higher than "likes", and the headline seems to mislead readers into thinking that only the angry-reaction was given extra weight, which is not true

- The data is from Facebook's own study, indicating they want to understand (and perhaps improve) user experience

- The study was from 2019, Facebook might have changed since then (my own newsfeed is overwhelmingly positive and not sensational so it could be)