I believe that Xabi Alonso will be able to fix whatever is the problem in Real Madrid between the players. He will strengthen the club and close the bond between the players. He just took over the club from the former manager and needs time to work on the players. Winning UCL next season might not be possible for Real Madrid, but the team performance will be far better than their current performance.
All xabi need is time and the magic he did at Leverkusen will be brought to Madrid and we will see Madrid back to the good old days where they were the dreaded team across Europe, when they lifted the champions league back to back in a row. I also agree that he may not win the UCL in the coming season, it will even be better if the expectations on him is lowered so he will not look like he disappointed when he is unable to produce the kind of results expected of him within the shortest period of time.
I also think people should stop complaining about Xabi Alonso and Real Madrid performance for now until the new season begins I think it's too early for fans to start expecting Xabi Alonso to turn the Madrid team around when he has not known the team very well. Real Madrid have good players but they suffered a lot of defeat under Ancelotti last season but now that they have a young manager they should allow him to work on the team to get the right formation that will help him to restore the team and make them to shine again.