I don't hate him. I hate Hitler. Who incidentally also makes us all look insignificant. So don't use personal success as a metric for value. I think Liefeld should learn take some anatomy and creative writing classes, because aside from Image, and the variations on his comics that OTHER artists have had much better ideas and art for (Supreme, Glory, Prophet, etc.) all of his stuff... kind of... sucks. Mark Waid and Alex Ross literally made Kingdom Come as just a huge rebuke to the vapidity of Rob Liefeld. Like, it looks cool, but once you get past the coolness (which many people never do, which is why we have another fucking Transformers movie this summer) there's nothing there but bad art and desperate sci-fi justifications for destroying shit is shiny ways.
Even Deadpool is just a mash-up of Wolverine's powers, Deathstroke's weapons, and Spider-Man's costume, with the bonus of "He's crazy!" in order to justify substituting jokes for character. Billy from Family Circus is more interesting than Deadpool.