*sigh* 
God forbid you watch the video to learn something. That's why I know way more than you foolish mortals, I study the game

and you don't.
Basically what he said was that last year he came with a concept of free styling over beats from various xxl freshman artist. He was also in talks with xxl. This year, not only are all of the xxl freshman artist doing freestyles but xxl went out of their way to have his past freestyles removed from various outlets. They basically took his idea of the xxl freshman freestyle and are trying to cover it up by having blogs delete his.
Another issue he raised was that someone at xxl is promising people the cover if they meet a certain criteria but when they reach the requirements they still don't make the cut. According to him he should have qualified and Post Malone called them out for doing the same thing to him.
I'm personally not that familiar with King but I know he rocks heavy with Kay Slay.