By Daniel Bates Skip Bayless has been one of Kevin Durant’s biggest supporters, and at times, harshest critics. And on Wednesday’s airing of “Undisputed,” the FOX Sports 1 personality named what he deems to be KD’s biggest mistake: following Kyrie Irving to the Brooklyn Nets. I first guessed this… It appears to me that Kevin and Kyrie have gone Splitsville, they are not besties anymore … Following Kyrie to Brooklyn is KD’s biggest mistake. There was a better route for him. If you want to go do something, if you want to take a challenge, it’s the other team across the bridge. It’s the Knick…