Pep is a genius manager, albeit still flawed in his own right, don't think we can dispute that. However, he's never been asked to actually help build a side to improve multiple places and ultimately win a title. I have more respect for Klopp in that he did that with Dortmund and Liverpool. Obviously Fergie did it north of the border with Aberdeen then did it again with United and totally rebuild the team a few times.
Barcelona was the coming together of the best La Masia has ever had to offer and then peak Messi with amazing teammates. Bayern are who they are in the BL. Then City, who plucked the main football people from Barca and heavily invested under previous managers, continues to spend handsome amounts in successive seasons under Pep. That's almost 200M per season spend at City with Pep.