I had some EVS guards that had the plastic snap near the hinge and I didn’t even crash, Acerbis guards that broke just like yours with the bolts flogging out.
I think you are fighting a losing battle, the bike shops/companies will just blame the damage on crashing even if it is obvious they have simply worn out.
Good luck either way.
I am onto some Fly Racing guards now, they seem like a good thing but only time will tell.