I would say that age is not as important as maturity in making a good paramedic, or EMT for that matter. Is it possible that the "old head" was trying to teach you something and all you are picking up is the negativity? Please don't take this as a put down, I don't know you or your situation, just playing devils advocate. I do recognize the possibility that you ran up against someone who really has 1 year of experience 22 times but dosent realize it.