Hold on. I agree he is largely a soulless rap robot who have little to no artistic flair, and is instead 100% obsessed with the technical side of the art...but Stan is a classic SONG. It's not formulaic, it's very well done. He's got a small handful of songs like that, including Cleaning Out My Closet...White America...and a couple others.
Eminem is largely a battle rapper with an infinite budget. Can't really write songs outside of a few examples, and has had the ability to have hooks given to him. He seems to have very little interest in the poetic side of rap. When he expresses emotion it's largely one extreme or another, with no nuance. It's either "I'm fukking mad" or "I'm fukking sad" or "I fukking love you." I don't like songs like Mockingbird but at least shyt like that showed a vulnerable side to him...but even that song ends with him basically making a childish threat lol.