Actually that's what this post is about, Flex goes by Hip Hop rules, Drake isn't writing his best stuff, Drake disappointed us as a lyricist, Drake doesn't want to tell the truth about writing in his quest to be the best of all time, which disrespects the art form and the culture, so there's beef.
Eminem is one of the greatest MC's of all time, that writes his own stuff, and got thrown in the mix, allegedly because of a joke but since he has a very strong fan base, his fans decided to let Drake know he couldn't beat Em, and that helped infuriate Drake to react the way he did.