I don't agree with the blanket statement of "If you're not getting offers, you're bad at interviewing". I understand it's circumstantial, and in most cases, this is probably true.
I have a movement disorder that is way worse in interview type settings (nervousness increases the tics). How does one overcome not getting offers based on a legitimate disability? Also, it has been part of the discussion in the perception of my performance in past jobs, which has nothing to do with actual merit. The MBA did not help with insecure managers in interviews. I watched Maury Povich to remind myself of all my good choices; I had a rough time.
I've been with a new company for over a year now! I addressed it with them in the interview, and they said, "Just get your work done", and it's been a breath of fresh air working here. Maybe if I had addressed it sooner, it wouldn't have been such a problem, I don't know.
I'm more looking for guidance on this issue than a confrontation. :)
This has been an exception, and ignorance has caused a lot of employers to miss out on a great employee.