A crisis can be called a situation when a team of the level of Real Madrid cannot win a single title [...]
In part you are right, because if Real were an ordinary team, you could simply forget about the results. But damn it Real'M is no ordinary team, (and now the pattern of failures outside the limits of their own league is clearly visible). I'm not sure what the matter is, but apparently Real is focusing on the skill of the players and not on the age. Since the average age of Real players is close to 30, and with such a composition, it is impossible to keep a high pace of the game for a long time. 
Teams at the level of Real Madrid really should get a trophy, so when they fail to get it they will be labeled as a failed team. Their failure last season was due to their lack of consistency, when many of their players were injured, Zidane insisted to fight in two competitions (La Liga and Champions League). Instead of getting the title, they failed in both competitions. In my opinion, if they only focus on one competition, then their chances of getting the title will be greater.