I don't know why cowboys fans are disappointed. No coach with a current HC job in college or the NFL we're going to ever agree to be a Jones puppet. No big time prospect coordinator like a Roman or Bieniemy with options coming up for HC jobs would choose to be a Jones puppet.
Like I said before this was going to be someone who was previously a head coach and is now a retread who is desperate enough to agree to be a puppet and/or work in an organizational culture that is this toxic. The only choices were people like McCarthy, Marvin Lewis, Norv Turner, Jeff Fisher, Hugh Jackson, Jim Caldwell, etc.
Out of that list McCarthy was the only one with any winning credentials. He just became desperate because no one wanted him after his public rift with Rodgers and after a complete rookie HC just walked in and coached up/schemed the same team McCarthy underachieved with to a first round bye in the playoffs.
Will he win in Dallas? No. No one can. It's a well poisoned by inbred arky idiocy and a roster that hit it's peak in talent this season and now will become ravished by bad contracts and poor drafting. People locally like to ride McClay's nuts but outside of that great 2016 draft they've been terrible. 2017-2019 drafts were poor and the roster is about to take a major dip in talent.