4 year old home with crumbling driveway

Title says it. My home is 4 years old, and I’m the first owner. Fairly early on, the drive would get small crumbly spots. Fast forward to now, and it looks like the pic. Any ideas on how to stop it without replacing the whole driveway. It’s probably too late to contact the builder, but I may try. The reason is say that is because the home came with a 1/2/10 craftsmanship, electrical, and structural warranty.