After failure of my startup's first iteration, investigation and data made it clear my cofounder was at fault:

- deals that made a loss - poor relationship management - investing way too much in blaming the team around her

This ended up with a company seriously in the red, heading to liquidation and a completely fucked reputation.

Iteration two: flying solo, small team and 18 months in, we are in profit and I've fixed most of the relationships that needed some help.

I have a department head who I can trust and points out my blindspots but never wanted to be a founder, which is fine.

Be very careful your cofounder isn't just saying the right things in the hope of a payday.