Not negative compared to every other team, but still not deemed progressive enough or enterprising enough for Barca. Players fell out with him because of a difference of philosophy on the game and allegedly due to 'footballing matters'. If that's not because of his style of football and tactics, then i dont know what is.
Gaurdiola's style is much more 'free and intuitive' and I've never seen more attacking football. And you dont hear anyone at Barca complaining, even if they lose an odd game like they did on Sat.