Have you worked one on one with a coach to address your deadlift technique?
Yes, you may have aspects that require adjusted to DL technique.
Have you identified a coach to help you look at your situation?
Have you addressed rebuilding your feet?
Your pain returns because the cause of the issue isn’t being addressed.
Until you address the cause symptioms/pain will continue to return.
Are addressing your unstable shoulder?
You have a desk bound job, but that doesn’t mean your posture is screwed for many hours a day.
Have a standing desk, are you sitting in an organized position?, have you watched the episodes on sitting positions?
Do you do anything during the day or before/after work to address that you sit for long periods of the day?