Age Discrimination, I'm Thinking  

I've got 30yrs in the helicopter industry.  Based on the limited info I have (your post), I'm almost certain the problem is your attitude, not your qualifications.  Every employer hires fully qualified people that they think will contribute to their work environment.  "Most" qualified is meaningless compared to fully qualified and pleasant to work with.  It's probably not age, it's probably that arrogant and grumpy easily shows up in an interview and you earn yourself a no thanks.  Good luck though, keep trying and someone will hire you.