Almost hoped for an analysis about what, how, and why happened, but it turns out that Elsevier has little to do with the story and the author had a Twitter spat with someone years ago and is now celebrating the fact that the other side has been shown to do what? for which some of their papers had been retracted. Yes, I'm as confused.
Publishers have the final say in appointing editors in chief (EIC) and editors. So they bear the ultimate responsibility for holding editors accountable.
A lot of people are to blame here, but Elsevier is definitely among them.