I'm not sure that's quite right. He's aware that a certain section of the supporter base hate him, or at a minimum don't want him as coach, but I bet he chooses to believe that that fraction of the fanbase is in the minority.
The thing that sticks out dramatically if you look at social media is the people that are criticising ken have the ability to string together a sentence and a logical argument. The happy clappers are basically your standard drones who cant say anything other than "go and support da crows".
Anyone with eyes and a brain can see ken is a failure. But the media brainwashing has made it seem like he's a hero which is enough for the happy clapper crowd.