In addition to Eminem and Cardi B, one of the big name acts at Coachella 2018 day three was Migos, and a lot of people were not happy with their performance. They apparently started later than scheduled and had sound issues, and it sounded like fans were disappointed in the actual performance as well:

People are also noting that Migos only played Cardi B's verse on "MotorSport" (over the PA, even though Cardi was not only obviously at Coachella but also in the crowd for Migos) and not Nicki MInaj's, just days after Nicki addressed a potential fued between her and Cardi:

The only guest Migos did bring out was Lil Baby for "My Dawg." Here's a clip from their set: