Did BV get fired or did he just quit?

I'm kinda curious if the plan all along was to keep BV or let him find another job aka fired. From the outside looking in it kinda seems that way, because we all know Martinez was fired with his "resignation" earlier. But I could be wrong and he might have just left because he pretty much got demoted. If he did quit willingly no one can really blame him because most people would have done the same thing. IMO I think Bob pretty much fired him because by bringing his brother back he knew the chances of losing BV was huge but he did it anyway, I don't buy that crap about BV being 100% on board with the return of Mike because he knew that he would be demoted like he was and OU tried extremely hard to make it look like everything was picture perfect which is really out of character for them. So what do yall think really happened, because we will never get a confirmation about what really went down?