Hi
4 things.
Use surface bodies and thus shell elements (happens automatic when meshing a surface) instead of 3D parts as you have now (as these are thin structures – no need for 3D parts).
Analyse the whole model – so no symmetry is then needed.
Add a small restrain in one vertex in X or use weak springs (https://featips.com/2020/05/14/weak-springs-yes-or-no/).
Finally one does not need adaptive meshing region if you do as per the above suggestions (so take that away).
All the best
Erik