Who rapped “I’ve created a monster, ’cause nobody wants to see Marshall no more”

EMINEM

["This Detroit artist won an Oscar for \"Lose Yourself\" and often references his alter ego Slim Shady in songs about fame and struggle."]

This clue references a famous lyric from Eminem’s 2000 hit "The Real Slim Shady," where he raps about his alter ego taking over his public image. The line plays on his real name, Marshall Mathers, contrasting it with his stage persona, which fans embraced more. It’s a direct quote, so the answer is simply the rapper’s well-known name.