Come on Elizabeth... "He has left Spain in such a mess"... I think you have missed the fact that Spain is governed by a democratically elected Government and comprises of 17 autonomous regions, all with their own Governments and parliaments, holding great executive powers? How can a ceremonial head of state have left "Spain in such a mess"? Is it his fault that the real estate bubble exploded? Is it his fault that the worldwide crisis which started in the United States engulfed the world and hit his nation mercilessly hard?
This King started his Reign as a puppet from dictator Franco but, despite being indoctrinated as Franco's effective hostage, nevertheless took a firm hand and lead Spain into the modern world, to liberalize the country, to join the EU and NATO. Spain, in the 1980's still one of Europe's poorest countries made a gi-gan-tic boom in the Reign of King Juan Carlos. It started with the best Olympics ever, the one of Barcelona 1992. Then the world suddenly saw a new and a modern Spain. The nineties and the first decade of the millenium saw Spain as one of Europe's economic miracles. The King's reputation and public approval rose to unseen heights.
The deep crisis hit Spain hard. Almost half (!) of the youth can not find work. Spain and the Spaniards had to bring immense sacrifices to keep up those financial giants to prevent the whole nation tumbling down. With draconic measures Spain has now found the right way. Of course this immensely affected the trust the Spaniards have in their country, in the State, the institutions of State, the financial world, all embodied by the person of the King. They see that Spaniards are enforced to leave their properties. They see that Spaniards have to queue for food banks. They see that the best and the brightest leave the country to find jobs elsewhere. It is only natural that the general discontentment translates into more zest amongst separatists, more hostility against "the gentlemen there high up above us in Madrid" and ultimately embodied by the most profiled Spaniard of all, the King.
Please, no any of today's present Kings has endured what Don Juan Carlos de Borbón y Borbón had. Born in exile in Italy. Spending his youth in Portugal. Back in Spain being separated from his parents and "hostaged" by Franco to brainwash him in a "true patriot" (according his fascist ideology). He saw his brother-in-law loosing his throne in Greece. He had to fight for his sake amongst scepticism and pretenders. In the first years as King he was met with suspicion, the Spaniards fearing a second Franco hidden behind that smile. The coup d'état by discontent military which was slashed down by the King's unlimited support towards democracy.
Really...
Palmam Qui Meruit Ferat (Honour Those Deserving Honour). After the announcement of the abdication, the Spanish media were overflooded with retrospectives about the King's Reign. The Spaniards have -again- realized how eventful the King's Reign was, how they all live in a total different Spain than when the King started. The praise and the approval for the King's Reign is high but all admit that it was wise he abdicated. The King visibly is in pain, the Spaniards see a very aged, old man suffering physic problems. Behind him they see a tall, healthy and proud Prince, full of zest and facing a bright future. It is only natural that such a change revives an institution. We saw it in Belgium. Even in the Netherlands, where the approval for Queen Beatrix was rock high, her abdication rejuvenated the Royal House.