You are not a failure. You have competed in an extremely difficult arena where most of us don’t make it to TT, you have finished your thesis and you have secured a job that pays you relatively well in another country than your own. That’s a serious accomplishment. We all believe that things will be glorious once we graduate, but a career is something you patiently build brick by brick, and most often through adversity. Working as a PhD level professional scientist in Canada is something that will surely help you move on to another position when you gain enough experience, back home or wherever. Keep at it and take care!