I'm sorry to hear of your accident in your race. I wish you speedy recovery and I hope your bike is okay too.

you can't strip that bolt on the crank arm. You would need to be a 500 pound gorilla or use an impact wrench. Regular bike shop would have neither.

I wonder if there is some weakness in the design as well. I've had my crank come loose on SRAM force. I do my own wrenching and I tightened down that bolt super tight. Last time it came loose, I ended up using a very small drop of lock-tight, the kind you can break loose as an added precaution. Granted, I'm no where as strong as a regular sized men, so my super tight may only be so so tight to an average guy.