People forget that there are different types of managers. Most managers who are successful at small teams don't actually make it with big teams as we saw with managers who managed Barcelona after Pep for example.
His statement about each club having its own reality is true. Pochetinho did great at Spurs but really struggled with PSG, different demands, and atmosphere. Pep is probably the only manager I know that is demanded to win a UCL. All of his accomplishments are belittled and I am pretty if wins the UCL it will also be belittled.