I don't think what was done at Leverkusen means it will be the same in La Liga. Although there is indeed such hope, but we must realize that the situation is different in this case so everything cannot be simply equated.
Being in Madrid will indeed be a little advantageous where he is equipped with resources in terms of players who are indeed very qualified but on the other hand the pressure is also very heavy so Xabi must remember that.
The risk is comparable if in the end he can give his best then in the end he will be one of the coaches who will be praised but otherwise if in the end Madrid's performance seems ordinary then he must be prepared with all forms of consequences.
Adaptation is something that must be emphasized where when the adaptation is good, it does not rule out the possibility that what he did at Bayern can be repeated in Madrid but it also cannot be a benchmark because different clubs can be different fates.
I totally understand your stand point, it's not always rosy everywhere and again on the aspect of pressure, yes Real Madrid as a club itself is a pressure because of the clubs accomplishments so far, anyone who's in the helms of affairs is pressured to perform at a certain level and it non-negotiable that I understand. I see Alonso as another Zidane in Real Madrid the little difference is that, his been to another top league and competed with the best of the league, I see him having a successful spell in the Spanish capital, his been in team for long as a player, then as a junior team coach before picking up the job in Germany and now his back.