The music is by Finishing Move. They’ve mostly done music for Xbox stuff, like Halo: MCC, Halo Wars, Crackdown 3, even MSF, but also Borderlands 3, or Callisto Protocol.

Mick Gordon was already out for the Doom Eternal DLC, Andrew Hulshult did that (Dusk, Amid Evil, Prodeus).

I’ve read a bunch of comments, where people are specifically calling out Marty Stratton, Studio Head at id. He posted an open letter to reddit, placing all the blame for issues with the music and soundtrack for Doom Eternal on Mick Gordon (which Mick later refuted with evidence).