When Eminem got big, although him being good at rapping was one of the selling points, people didn't really talk about his technique (which he'd buried since "Infinite"), it was more about his cartoon sicko persona, his humour and outrageousness.
His technique in that SSLP and MMLP era was better, though, as far as I was concerned because it was semi disguised (first becoming really audible again on "The Way I Am", which in many ways set the template for his subsequent career).
This isn't a great example at all but I remember the line "I strangle you to death and I'll choke you again, and break your fuckin legs so the bones poke through your skin" - where "choke you again" doesn't rhyme exactly with "poke through your skin", but still rhymes (and the assonant "bones" helps emphasise it). It feels casual, insouciant, like his don't give a fuck persona at the time. It felt loose, which is the exact opposite of what his flow became subsequently.
And yes, he has terrible taste. An interesting example, though, of the freedom which tastelessness can confer.