Structure (neither an abstract „one“ structure, nor abstract-concretised particular structures) is not all-encompassing. It’s not a causation of all things and not the basic start/origin or basic standard of the things them’selves’/as such and not of the things for-the-observer/perceiver etc.
The existence/appearance of Structure is a pattern and structures are different patterns. It exists parallel to the individuality of things and all other things&phenomena. And abstract-concrete structurations/constructions are secondary particular and non-basic constructions that are not voluntaristically changeable but contingent.