This deck was a disaster waiting to happen. The structural integrity of the hangers and fasteners was compromised.

Framing anchors come with special nails that are required for use with each anchor to provide the load carrying capacity and avoid eccentricity. Framing anchors, framing hangers, and framing ties ...

Replace the old post with pressure-treated wood. "Posts should not rot if you're using properly treated pine," Reeder says.