At Real Madrid, it's not enough to play good soccer. It's also about satisfying egos, handling the press and winning trophies. This pressure is much greater than what Alonso experienced at Leverkusen. Alonso has a lot of potential to succeed in star management because he knows this environment as a footballer and he is intelligent. Xabi Alonso is also a former Real Madrid player. He knows the culture of the club and the dynamics in the dressing room. This could help him build a natural relationship of respect with the players.
There is still time for Xabi and the Madrid players to unify their vision as expected. Regardless of the egos of the star players, in the end, if they don't follow the coach's instructions, they will be eliminated from the main squad. So I'm sure the Madrid players will be mature in the coaching transition and do their best to build chemistry with each other.