[NumberCruncher]

Maybe your founders deserve a second chance? If I were you I would tell them that I stay but:

- I want to have from now on x% more salary, kind of a PITA bonus because I have to deal with amateurs

- maybe (more) equity, because if I have to tell a founder how he has to do his own job I am not only an employee any more

- to claim the right (maybe include it also in your contract) to refuse breaking sprints

And of course I would start for looking for a new job, just in case.