We hear this all the time. Custom orthotics, expensive insoles, barefoot shoes, motion control sneakers, Hokas - you've spent hundreds (maybe thousands) trying to fix your flat feet.
Here's what nobody tells you: None of those solutions work for flat feet on concrete surfaces. They were designed for different problems.
The real issue: You need something that works with your flat feet, not against them. Something that strengthens instead of creating dependency. Something that protects you from concrete without turning your foot muscles into mush.