Best of luck to you. I think I’ve learned for me it’s cyclical and I’ll have flare ups that last a few years, then it dies down for a few years. You have lots of the bases covered in your list of things to try, I’ll add one more that consistently makes a difference for me: jelly toe stretchers like these (the ones that you stick your toes fully into, not the half-depth ones) https://www.amazon.com/dp/B00SVEW9IS?ref=ppx_pop_mob_ap_share