First of all I would have really liked to see Guardiola managing an average team as well to see his quality better. Because he started his career with Barcelona B team. And the teams they have managed after that are only Barcelona, Bayern Munich and Manchester City. He has been really successful with these teams maybe. But I also agree that even an average manager would become successful with this kind of teams. Maybe he wouldn't be as much as Guardiola but the player quality would still help a lot.
However I must admit a fact that he literally built Manchester City according to his will after coming here. I think this is a very special time period of his career here because of that.
Many say Pep Guardiola can only coach big teams and big funds, of course that has pros and cons, but apart from that, for me personally, he is the best coach in the world.
he was appointed coach of Barcelona at the start of the 2008-2009 season, which was a very brave decision by removing Ronaldinho, who at that time was a club icon and placing the burden on Messi's shoulders, who was still very young at that time.
In the previous season at the hands of Rijkaard, Barcelona had a bad season, finishing in 3rd place under Madrid and Villareal.
With all the conditions at that time, there were many doubts about Pep Guardiola, who incidentally lacked experience. Until the first 2 matches of the 2008-2009 season, Barcelona could only win 1 point in the first 2 matches of the league, making it even more difficult for Pep Guardiola. until finally it got better, and Barcelona continued to be consistent and the rest is history.
then he chose Bayern, which is clearly a big team, but Bayern is not the type of club that likes to spend money buying expensive players. Even though he failed to bring the UCL to Bayern, he cannot be considered a failure. then he went to Man city, and what happened like now. Man City dominates England, and succeeds in winning the UCL. he's a coach who builds the identity of a team. in his hands, Barcelona, Bayern Munich and Man City are teams to be feared and have captivating games.
if he chose established teams, with all the achievements in his previous team, surely many established teams would want his services.