I remember that feeling well - it took a long time for me to get diagnosed, then all the first doctor offered was the "cookie cutter" approach to treatment. He actually "fired" me as a patient because I had the nerve to see and ID specialist when I wasn't improving. It would probably be well worth the time to find an experienced specialist...
First, let's ask the Connect community - Does anyone with bronchiectasis have a good pulmonology or ID doc in the Oklahoma City area?
The second approach is for you to get on the phone and start calling pulmonologists near him and asking specifically if they treat patients with COPD + asthma + bronchiectasis + pseudomonas regularly, or can recommend someone who does. Oklahoma University appears to have an extensive Pulmonology department - that's where I would start.
Are you able to help your Dad with finding a doctor?
Sue