Just saw the new question you have opened.
I have gone through your question and I agree that this does not sound like plantar fasciitis.
There are several others possible diagnosis which need to be considered and ruled out by an experienced foot and ankle specialist orthopaedic doctor.
Major among these are calcaneal neuritis, different forms of compression neuropathies of the foot including tarsal tunnel syndrome abductor digiti quinti nerve entrapment and medial calcaneal branch of posterior tibial nerve entrapment.
Neuropathy should also be considered and ruled out. Neuropathy can be a result of many different underlying processes and may require thorough investigation.
As you seem to have had multiple steroid injections plantar fascia rupture and fat pad atrophy may also be causing pain and should be ruled out.
You should also have nerve conduction velocity study and electromyography to better define any underlying nerve problem. This should be done by a person who has got good experience in diagnosing foot and ankle nerve problems.
Your best bet would be to see an orthopedic foot and ankle specialist in a nearby university teaching hospital. Here you can often get to consult specialists who are at the forefront of knowledge frontier in their respective fields. They have the added experience of treating complex cases like yours as most such cases ultimately get referred to teaching hospitals.
Feel free to ask any follow-up questions.