Woww this is a topic I have been dealing with since birth and pain since a kid in school and got worst playing sports and at 35 now still have those days were there sore all day but use to it. My feet are completely flat and over pronated. I wore inserts most of my childhood into teens and it was just to keep them from gettin worse then they already were. Never did much and after 18 just stopped wearing them. My best advice is to talk with someone who has alot of sneaker knowledge and can really help you find a comfortable sneaker for everyday use. The sneakers I’ve found best fit and comfortable for me the last few years have been the brand “brooks”. They have various models that are for people like us so you just have to find the pair that fits your feet most comfortable. At the moment I’m wearing there “ghosts” model and they feel great. Now I work at a hospital and have talked to many many doctors and NP’s and even one who has had the surgery to fix flat feet. It called “the all American surgery”. It super intense and insanely insanely long recovery. I remeber the lady telling me something like no walking for 6 months and then 6 months of rehab pretty much learning to walk again. And worst part is there’s no guantaree that your feet don’t go back to the way they were. So that’s the reason I never did the surgery and just couldn’t deal with being unable to do anything for myself that long. Hope that helps some of y’all . Letting ya know your not alone and it’s and ever goin battle of just finding the best ways to stay comfortable as possible