Avoiding outcomes like these would be a reason I would go through YC if I wanted to chase VC money rather than bootstrap. Having a strong minority investor beside you; one where the VCs do repeat business, and one the VCs care about their reputation, would be very helpful.
> Tech people need to retain way more of the equity
That's just fantasy. Common shares really suck: VC rights trump and VC model has a lot of dilution built into the success case. The median return of a any business is zero. VC money gears the risks higher for a Tech/investor. Good luck!