Eh, Spain fundamental problem is still what it always was - the near impossibility of defaulting on your debt, coupled to the house price collapse and an exceptionally fragile, zombie banking sector. Which means people waste their disposable income on paying back loans they will never fully pay back to banks which don't have the ability to provide credit back into the economy.
Coupled, obviously, with a huge tourism sector, which obviously, in the year people aren't travelling... Well, not so great.
I mean, the overally conclusion is that "don't put all your eggs in ones basket", "asset bubbles are bad", and that expecting the private sector to magic the economy better by itself doesn't work. And neither of those conclusions are especially friendly towards free market oriented economic ideologies.
The Left has to be honest and talk about labour market policies, painted as "job security measures" that simply do not favour incoming graduates. Its a feature in latin (inc. Belgium) countries that moving on boomer/gen x deadwood is too hard so keep the 20somethings on sh**t contracts.
Generally decreasing job security is a right wing prerogative though?
Indeed, the 2012 labour reform from PM Rajoy was seen as a huge attack on job security by labour unions and so was the 2010 reform under Zapatero. Both made it easier to fire employees and reduced job security, and both were seen as part of the broader package of cuts and austerity forced by Merkel/the EU
And indeed even now in 2021, Podemos wants to repeal the 2012 reform in full and flip flops on whether repealing the 2010 reform would be good or not; while PSOE wants to do a partial repeal of the 2012 law.
On the other side, one of Cs' key proposals since they became big nationally has been to create a "single contract", merging temporary and permanent contracts into a single contract that offers more flexibility. And of course as you might expect Vox wants to go even further into labour reforms.
Fun fact: There have literally been 0 reforms since the 80s with the objective of increasing job security or making it harder to fire and hire people. Yet despite that, unemployment has always been above 10% except during a brief period during the peak of the housing bubble.