Where/when did he quit on the coach? What is the evidence. People close to Fox with an axe to grind can be contributory evidence but not the sole evidence. I don't buy the narrative on Fox and Brown. It became in their mutual interest to say they were in alignment because certainly Brown was fired for his inability to get through to the star player despite constantly torching him in his pressers, and that star's reluctance to re-sign with the franchise.
If your boss publicly called you out at every meeting as not meeting your assignments when you were a top performer, would you want to stick around.
Honestly, all of this is water under the bridge, but I don't understand the narrative that Fox and Brown were in the right and everyone else was wrong.