I sucked at programming, rejected by google twice. I could finish problems and even finished whiteboard puzzles, but I never enjoyed large infrastructure projects and that showed in the interviews. I had a "kill me now" face as one HR person put it :) OTOH I love loved mathematics and working on complex scientific problems. So I switched to machine learning and scientific computing, and fforward a few years, I won the best employee of the year award in a fortune500 company with over 20K employees and have a couple of algorithms patent pending. Just one more line for you to think about.