The concept album is Slim Shady is trying to get Eminem cancelled. The album is filled with typical Slim Shady comments and jokes from the older years (modernized) that are now considered too offensive. Now, (I’ve heard) Gen Z and others who are listening to this stuff for the first time are getting confused and upset thinking he’s a terrible person.
But, all the fans who wanted this got exactly what they wanted and seem to be genuinely happy with the album. It’s those who are shocked at the lyrics that are upset. Anyone who’s been a fan for long enough knows it’s just for jokes.
So the joke is, Eminem gave fans what they asked for and then some of the younger people are thinking it’s too offensive and are now upset.