Wow...this is pretty fucked up.
One thing that needs to be done is for the repeating sample to be turned down when the rap starts. Is that Steely Dan sped up?
When the rap comes in, that's a pretty jarring transition. Change is good, but it shouldn't make the listener jump...unless you were going for that, I guess.
And yeah, the rap is completely incomprehensible...The loop is fighting with it, and it may be distorting...
And this part will just sound mean, but hearing an Australian accent in rap is going to take some getting used to. Honestly, I thought maybe it was a Vietnamese accent when I couldn't understand any of the words...then I thought maybe it was IN Vietnamese...then I heard "straight back to school" at the end and that sounded like somebody from Oz.
Disclaimer - I am a total amateur hack, and I don't listen to rap...Aussie rap may be taking over the world for all I know. But sonically, I think you could clean up your vocal by articulating a bit better and turning the loop down.
Good luck