Well it took Guardiola quite some many years to be able to win the Champions League despite he having one of the best teams in the world when it comes to great players,he always had great names but it took him several years in order to harmonize this team even in European competitions so all kudos to him,for me though any other coach would have won at least once the Champions League with these players in his disposal,just my opinion.I do believe Guardiola to be one of the best coaches out there but I think it took him a lot of time to win a Champions League trophy with all these great players,nevertheless the Champions are never judged so let's see the next upcoming season.
One area that Guardiola has developed himself is his relationship with his players. He has learned to relate with his player more harmoniously which has led to the loyalty of most of the players. The coach has always had the best players which was the reason why they dominated the English premier league. But the champions league eluded them for a long time until they got it last season. PSG is at the same level as Manchester City was last season. But City was fortunate to win the trophy but PSG is still waiting to lift the trophy. I wonder what would have been the fate of Guardiola, if City had lost the Champions League, maybe he would have been sacked.