Leverkusen is certainly one of the classic teams that wins and then strips itself of the best players or the best coach, but who wouldn't have done it, everyone, everyone would have gone to try to win something great with some European team like Real Madrid and even if Xabi did well to try then it went as it went but he tried.
I don’t really see anything wrong with the move Xabi made to Real Madrid. It was an opportunity for him to actually explore more and get to learn new things with other top clubs in Europe. I am sure he has learnt some lessons and will know how to do better when given another big team like Real Madrid to manage in the future.
It was a trial worth it and with his past performances from other teams he has managed, I still see him as a very great coach that won’t stay long before getting to manage another club. His past records especially at Bayern Leverkusen will pave way for him to get into another club even though not a very big team like before.