For what it’s worth…
I suffered and got high instep insoles and wore them for years. Then i read a daft book about bare foot running that sent me off on that fad. I bought a pair of ‘minimalist’ shoes, walked around barefoot at home, and I chucked the insoles out and… blow me but I’ve not had any problems since.
I didn’t get much else out of the barefoot thing but my arches are no problem now. I suspect it was years of wearing super supportive boots for work. After all, arches are meant to be strong structures in engineering, but my lovely supportive boots continually supported them them and i suspect left them weak and prone to falling.
Probably all b*ll*cks but you have my sympathies.