Because of that complete douche we all know would have the worst beat on the album.
I'm also not a fan of Em's flow here, or many of his lyrics, the writing and the delivery of it all just sounds fairly sloppy and it reminds me a lot of My 1st Single.
It also highlights one of Em's major problems in recent years and why he will probably never have the same lyrical effect of the original MMLP : his inability to remain on topic.
He starts out strong or with relevant lines but then quickly rambles in to aimless and generic female insults 'shorty this' / 'shorty you're...' etc. - original MMLP Em made all his verses in the song relevant and hard-hitting. Em still does this occasionally but in general he's always so much more willing to settle for rambling when he runs out of relevant lines.