Again, neither of us are constitutional lawyers, but for an argument like that you have to present and challenge the arguments used in the actual sentence. Conspiracy theories without backing are only useful to those who gain political capital out of them.
And for the record, I read that, back in the day, Ciudadanos asked the Defensor del Pueblo to bring the Andalusian estatuto to the Tribunal Constitucional. Not sure if he did, or who can and cannot bring laws to their court.