I think there is also consensus that this dev wasn't very good. Not sure I have seen a site so complicated that you couldn't at least roughly approximate it in 12 months with django.

Whole deal sounds to me like she didn't give a crap about long term future of the company, she just wanted to ride the funding into the ground through her paycheck. I'd bet she demanded more equity in a moment of faith, but by that point they were doomed.