What does Eminem's first verse mean in romans revenge By nicki Minaj ft, Eminem?

I heard it was something about him being a homophobic, or could that be a different part?

I ain’t into S&M, but my whip’s off the chain A little drop of candy paint drips off the frame Twisted-ass mind, got a pretzel for a brain An eraser for a head, fuckin’ pencil for a frame You don’t like it then peel off, bitch Every last woman on Earth I’ll kill off, and I still wouldn’t fuck you, slut So wipe the smile on your grill off, I swear to God I’ll piss a Happy Meal off Get the wheels turnin’, spin, and wheel off Snap the axel in half, bust the tie-rod Quit hollerin’ “Why, God?” He ain’t got shit to do with it Bygones’ll never be bygones, so won’t be finished swallowin’ my wad I ain’t finished blowin’ it, nice bra Hope it’ll fit a tough titty, bitch Life’s hard, I swear to God, life is a dumb blonde white broad With fake tits and a bad dye job Who just spit in my fuckin’ face and called me a fuckin’ tightwad So finally I broke down and bought her an iPod And caught her stealin’ my music, so I tied her arms and legs to the bed

Set up the camera and pissed twice on her Look, two pees and a tripod! The moral to the story is, life’s treatin’ you like dry sod? Kick it back in its face, my God It’s Shady and Nicki Minaj, you might find the sight quite odd But don’t ask why, bitch (Ask why not)

The wo-world is my punchin’ bag and If I’m garbage, you’re a bunch of maggots Make that face, go on, scrunch it up at me Show me the target so I can lunge and attack it

Like a, raah, raah, like a dungeon dragon You fell off, off, they musta bumped your wagon You musta went off the back, I’m ’bout to go off the deep end I told you to stay in your lane, you just choked in traffic