Real Madrid has been the most consistent club so far in both the domestic league and in international competition, indeed they don't always win every season but they have never experienced a dark period where their achievements have slumped as experienced by other clubs including their competitors in Laliga Barcelona which due to mismanagement experienced a financial downturn that resulted in them not being so impressive.
La Liga is a farmer league, the top 1,2, and 3 always Barcelona, Real Madrid and Atletico Madrid, they just swipe their position and there's no club can compete against them. I think the reason why Real Madrid is successful in international competition is their key players are still playing, it's not like Barcelona where most of their players were retired and they need to make a regeneration. Funny as it may sound quite true also , these never change positions that much and its easy to pick the next team to win the cup in the next season based on this farmers league belief
Hope this changes in the coming years to make league more competitive!
With Casemiro leaving and followed by Benzema, Real Madrid will make some regeneration. The big change happen when both Kroos and Modric performance aren't good enough, Real Madrid might have a bad season like Barcelona in the last year.
As bad as this may look, these top guys were bound to leave the club especially that they are coming of age and a new generation was due to be introduced and their timing wouldn't have been any better!As for the Bad season I dont know about that, academy and a few new players to fill the shoes of the greats that are leaving should fix this...