I am a civilian pilot with roughly 6,500 total time and have failed 4 major airline interviews. Here's a little more about me. I am 35 yrs old and have been flying for 17 years. When I was 22 yr old I was fired from my first CFI job at a part 141 flight school over a scheduling error. I went on to instruct at a different 141 with no issues. I then went to a 135 cargo company and worked my way up to become the Assistant Chief Pilot and Check Airman. I then flew for a 121 regional cargo feeder. I upgraded with approx 200 SIC and failed the upgrade checkride, but passed on the second attempt. I flew as captain until obtaining the coveted 1,000 PIC turbine but it was turboprop and I didn't get any calls so I moved on to a 121 charter airline flying 737's as FO. Did that for 3 years before deciding the best thing for my family was to relocate and fly for a regional airline with a quick upgrade. I am a Captain and Line Check Airman on the CRJ 200/700/900. To date I have interviewed and failed to land a job at JetBlue, FedEx, Southwest, and Delta. I'm now eligible to re-interview at all but Delta and have not received any 2nd attempts. I update my apps daily and in each window for JetBlue. I'm pretty burnt out and frustrated trying to get on at a major. I'm just wondering what to do from here. Any suggestions?