"Instead of trying to evolve with the culture, he’d rather Make Rap Great Again. On the execrable “Fall,” which has already been disowned by guest vocalist Justin Vernon, Eminem carelessly lobs an anti-gay slur at Tyler, the Creator."—Pitchfork
As discussed in Infinite Crab Meats, there's no way of knowing if a rap album that's received a negative review in Pitchfork really is bad music or if it's merely a matter of the artist being punished for saying things that no one who actually listens to rap music would give a shit about.
In this case, there isn't even anything to be upset about. Eminem doesn't actually call Tyler the Creator the other f-word on the song "Fall." He just says he can see why Tyler—who's allowed to use the word, as a teh ghey person—calls himself that. And even then the word is bleeped out, lest Interscope Records is no longer allowed to release music.
Technically, unless there's some way of using audio software to unbleep the word, we don't know for a fact that the word that's bleeped out was the other f-word. It could have been "friendly."
Regardless, there's an important distinction to be drawn between what Eminem said and actually calling someone the other f-word. When Em said he could see why Tyler called himself that, the implication was that Eminem wasn't calling him that. We know, from any number of other Eminem songs, that he would have if he wanted to.
If anything, he deserves credit for this show of restraint.
The "Fall" video: