There's a rhyme and reason to the stained glass that's tied into the other symbolic elements embedded in the architecture. For example, the color scheme shifts as you pan from the nativity side through to the passion side. The lower panels are not totally abstract; there are vague shapes that sort of remind you of figures, flames, etc. but then it tends to pivot towards full geometric abstraction as you raise your head.

Like the Mezquita in Córdoba, it's hard to get a sense of how intensely all the combined elements make an impression just from photographs.

The whole church is completely covered in innumerable fractals of catholic symbolism and its main tower will be topped by a 29 meters high cross. Maybe you just don't like the style, which is understandable as it is quite divisive.