There are lots of opps he could have taken.
Sure, It might not have been a good role, but sounds like there were relationship issues as well. I wouldn't imagine his cut and run solely on "I cant program enough" -- He had to be either under performing or frustrated with the others' lack of leadership/performance/flexibility/ability to listen/you-name-it
There are too many reasons to leave a company, but who knows the truth....
Haven't looked at simple since we speculated over their biz model ~12 months ago on HN... and frankly, as i still perceive them as a simple proxy to Big Evil banks (TM) - I'll still never trust them....
Though that is not related to the story... I still have nothing to convince me to think they are not just trying to find a way to cash in on the most despicable industry in existence... banking.