Go see a good podiatrist if you can. They should be able to diagnose root causes of the pain.
for me, i found i was collapsing my arch as i ran. i ended up with inserts but also need to use lace locks, as they will give my foot more support and reduce how much the arch collapses.
also, if its been a while, check if you need new shoes.
You’re not missing much. You can get much, much cheaper versions of 2xu and the like from stores that perform as good or better than 2xu. They last about the same.
Also you can get execllent imitations of most big brands from ali for a fraction of the price (injinji being an example).