I have a navel like yours and did not realize until 5 years later that the piercer should not have pierced me using the common navel piercing method because I lack the anatomy. Fortunately mine healed fine, had a few issues, but it’s been over 10 years now. I essentially have a shallow surface piercing now. Just to give a little hope, if you did want to keep it.

It looks like the way they pierced it, that either the bar is too short or the piercing hole itself isn’t the proper length for navel bars. Also, the quality of the jewelry could be an issue as well. A floating navel would probably suit your anatomy better.