Rebuilding starts when you stop debating how bad it really was.

Repair stalls while both people are still arguing about the size of the wound. One wants it acknowledged fully, the other wants it scaled down to something survivable, and the disagreement itself becomes the new conflict. Nothing can be built while the ground is still being measured.

Agree to describe the damage once, without negotiating the adjectives, then move to what happens next. If you caused it, accept the larger version rather than the convenient one. If you were hurt, decide what would actually help now, since that question moves things in a way arguing cannot.