Failure has become a risk in coaching a big club. There is no coach who has pursued a career without problems. It takes a long process to achieve success. He is still young and needs a lot of experience to become a great coach. If he just stays in his comfort zone, he won't get a lot of good experience. he needs to think about his future, not just stay in one place, I know he has good potential, it's just that his dismissal at Bayern Munich made him step down from coaching in the big leagues.
When people say 'experience is the best teacher', soccer is one industry that further exemplifies that and it occurs to both players and managers. As players grow and play at different competitions and with different teams, they learn how to further maximize their potentials and talents. The same thing goes to the managers during their managerial experiences. While we have talented managers in the field doing exceptionally well for their clubs, they need the experience to be able to maximize their performance especially when they get signed to bigger clubs as elite development coaches or even as head coach. The more the experience, the better the performance. This is why coaches like Ancelotti of Real Madrid, Klopp of Liverpool and Pep Guardiola of Manchester City have stood out in the last season across their respective leagues and at the Champions league.