I got several things out of it... - Vet your potential co-founder more closely to make sure they have the skillsets they claim to - Pay attention to red flags

I got several things out of it... - Vet your potential co-founder more closely to make sure they have the skillsets they claim to - Pay attention to red flags and deal with them sooner. Withholding the admin password, for example, was a clear one. - Maybe build in a non-confrontational exit from the beginning. Sounds like the co-founder was trying to bullshit their way through it so they wouldn't lose out if the product did well. Perhaps a small amount of equity would have been an easier way to push them out?