One of the main reasons Pep Guardiola left FC BARCELONA is because the Club - via President Rosell - refused to accept one of his prime demands to continue training Barça: to sell Cesc Fabregas, Gerard Pique, Dani Alves & David Villa. The Club refused because they feared a fan base backlash, thus Guardiola said goodbye.
In the case of Pique & Alves, Guardiola felt they lacked compromise with the Club & his proyect. With Cesc Fabregas he felt fraud as the player he helped sign & return to Barcelona failed him as a person ( perhaps lack of discipline ). The case of David Villa is solely Sporting as in the scheme of Guardiola´s field settings & team structure Villa was out of place.
Interesting insight indeed.