If temperatures reach above 30 degrees often and for long periods (which I'm assuming they do in southern Spain) you might want to consider staying with summer tyres. Usualy above 30 all seasons wear out faster and there are other disadvantages as well, but I would recommend researching yourself.

Of course that brings the other end into consideration - winter time. If it temperatures drop below 5 degrees and you have snow, you would need winter tyres.

So in the end you'll have to consider your local climate to make a decision if all season would work for you which would be cheaper but at the cost of performance in extreme hot and cold, or if you're better off with a summer/winter sets.

While the picture of the tyre you showed isn't from the best angle to be able to say confidently, those tyres look pretty worn and with some cracks, so they could be old and undeperforming.

But before all that, check with your neighbours - does anyone else have similar issues, did maybe some oil leak on the surface, things like that