If you would prefer more specificity..
In the case of the Reformers Luther and Calvin, Sola Scriptura is more rightly Mea Scriptura - they merely replaced one authority for scriptural interpretation with their own.
Or more generality with more specificity...
Sola Scriptura is more rightly Mea Scriptura. Adherents merely replace one authority for scriptural interpretation with their own.
Carry on. It is so much easier to attack your invented straw man than it is to attack a nuanced argument.