Kill him off now! Give your fixed mindset a name, she'll probably have a different one from Nigel, but get rid of her by focusing on process and creating effective strategies to achieve your goals. Number one is, don't be afraid of failure, and don't be afraid to analyse why things went wrong.

Write them down, and then write down strategies for how you'll avoid such mistakes in the future, then they turn from failures to learning points. :-)

Cg