The problem is the liability factor. Imagine if you were involved in an accident/incident at an airline. When the public finds out that a pilot who had failed several checkrides was at the controls...well you see where I'm going. It would be a PR disaster.
My advice would be to find another job in aviation and/or continue to fly on the side or flight instruct. Make connections and maybe work your way into a charter/corporate gig. Keep going from there. Don't give up if this is your dream but also temper your expectations.
Good luck!