That's not just startups where that happens. Senior developers, especially the "man in a box" geniuses that don't work well with anyone else are downright abusi

That's not just startups where that happens. Senior developers, especially the "man in a box" geniuses that don't work well with anyone else are downright abusive of other developers (and God help the poor customer support or QA people that talk to them). On the other hand, guys I really respect just call those "rookie mistakes" and expect them to happen. Hopefully you catch them in code review before customers are impacted.