> Here work seems to always be some tedious chore that keeps you away from social life
This is just one manifestation of what's more generally a very poor work culture, in what amounts to a giant, self-reinforcing negative feedback loop. Management often lacks professionalism, salaries are poor, and employees are demotivated and must therefore look to anything but work for fulfillment.
To be clear, I don't believe this is inherently Spanish, due to our genes, the climate, or our love for fiesta: similar phenomena could be observed locally in the US or Northern Europe. The problem in Spain is how widespread these attitudes are, in a macro context where good opportunities have been scarce for decades, probably due to the lack of a vision for a national productive model and any effective policies in this regard.
Personally I believe any permanent solution will need to come simultaneously in a top-down and bottom-up fashion, with both effective state policies and a change in attitudes from individuals. The catalyst would likely need to be a multi-partisan, national and universal social pact rallying institutions (politics, education, unions, businesses, etc.) around a well-defined vision. Anyone who follows Spanish politics knows that unfortunately at present that possibility is extremely remote.