Real Madrid has a financial strength as a matter of fact I think they are among the richest club in the whole world if not the richest amongst others. But sometimes it is not about having financial strength and buying of best player, the problem is how to manage them properly, I remember when Paris Saint Germain squad was mad but guess what happened to them, they were finding it difficult to win a trophy aside there own league i mean it was that bad and crazy. Real Madrid has learnt there lesson last season and I doubt if that can repeat itself again because they will have no option than to fire Alonso.
You're very correct I can remember when PSG had the best squad we all thought would win the Champions League a squad made up of Messi, Neymar, Mbappé and other top players like Sergio Ramos and so but they couldn't win the Champions League trophy cause of miss management so Inasmuch as a club's spending power is very good, they still need a very good coach to manage the players properly.
Real Madrid have experienced failure with the Los Galacticos project in the past, and they have certainly learned a lot from that experience. For now, we'll have to wait and see how Xabi Alonso performs in managing Real Madrid luxurious squad, and we know it's no easy task.
Xabi Alonso already demonstrated his managerial skills at Leverkusen, successfully delivering trophies with a squad that wasn't as luxurious as Real Madrid. So, I think, with the depth of his current squad, Xabi Alonso should be able to live up to expectations.