One has to understand where Bob (shine) is coming from. He really doesn't like the Dodgers, actually, he hates the Dodgers and everything associated with them and that includes Scioscia, Hatcher, or any other former Dodgers that have been employed by the Angels.
I don't want to speak for Bob but I think it bothers him that the Angels haven't employed more former Angels. After all the Angels have been around for 55 years and one would think that there would be a few former Angels that could serve the organization in some capacities such as manager or GM etc but apparently the powers that be don't seem to think so.
As far as Dipoto and Scioscia go there was obviously friction there but I seriously doubt that was the sole reason Dipoto jumped ship and Bobs (shine) constant blaming of Scioscia for everything is overdone due to his hatred of everything related to the Dodgers.
ymmv