Why is Bayern so humiliated now?

I think Bayern's first few big moves this season really filled the fans with expectations, but the season is coming to an end and all the problems are really exposed! ! Although it was unstoppable in the domestic league, it showed fatigue in the late European war. Because the gap between the main players and the substitutes is too big, these people have been playing the game all the time! In addition, head coach Hitzfeld will leave after the season, and the morale is very unstable! It's amazing to be in the UEFA Cup semi-final, so it's normal to lose! ! ! !