What to do about the closet system?

I’m annoyed about the drawers on the closet system I installed. Part of the problem is because the drawer rail screw heads are too proud and the drawer wheels snag on them. I showed this video to the retailer, but they offered no solutions. Their only suggestion was that I uninstall the system and return it.

After looking at different systems, I decide to try an repair this one I already have. I do this by removing the drawer rails, chamfering my own fastener holes, and then replacing the screws with flush top ones. My plan works and all of the drawers now work properly. But a new product should have worked out of the box, and never needed my customizations.