Comment by Aurornis

The job is described as "founding engineer at a mental health startup".

Generally getting called in for a "founding engineer" interview is code for a company that doesn't have money for a full salary but hopes they'll find someone willing to work for some token equity grant. These jobs usually come with amateur founders who aren't good at hiring. They could have really been pushing for life experiences, thinking they were doing some breaking-the-mold interview technique.

I do agree that every candidate should know to deliver answers in the context of a work interview. Even when the interviewer starts asking personal questions, you bring it back to something related to the job every time. Everything that comes out of your mouth should have a focus of showing how you'll work well at this company because you've worked well in the past at other companies.

The interviewers may have been shocked when someone didn't know this and actually unloaded their personal life struggles without a filter. I bet every other candidate they talked to had been giving interview-appropriate answers so they didn't realize how broken their questions were.

Chalk it up to a learning experience. I am certain you didn't miss out on any great opportunity with these amateurs. You will probably never see them again. We all have embarrassing work experiences at some point, but this is a good one to learn from and then promptly try to forget.