The house is in the Platja d'Aro region and is ~350 m2 in size, with 4 bedrooms and a large outdoor pool, a short drive away from the beach.
Spain has a huge coast line. Being 'just a short drive drive away from the beach' isn't really a unique selling factor there. If you're in the first row, with sea view and a nice scenery around that might be a different story.
Looking at the size (350m2) and the pool, I think it depends a lot on the quality and age of the building.
As far as I know, Spain isn't at the high end of real estate in Europe, so 1.4 million sounds like a certain degree of luxury to me. But just from the stats you've listed here no one can judge whether the house is worth it or not.
If it's indeed worth the amount, then I think it's normal that it takes some time to sell. Luxury is a smaller market with fewer people able to afford it. So if currently no one is looking for houses in that area, your price basically doesn't matter.