There is, and should be, a red flag for these situations. No make that RED flag. If you go into an interview that leaves you feeling the least bit helpless or at someone's mercy then run screaming. Not politely, not quietly. Just say to calmly to the person that you find the situation abusive. It is. As you go out, if you see anyone or have a chance to talk to anyone, just tell them you found that your interviewer to…
Are you being glib or unrealistic? You're going to find many red flags for any job, perhaps severe flags. But you need a job. Or you have to roll the dice because you have deep knowledge of the red flags for your current job. Who finds 10/10 perfect jobs via an application process? Note: I probably shouldn't be commenting since I don't need to apply for jobs and conditions here are likely different from yours.
Early in your career it can be hard to distinguish the two, but once you've joined a company where there really were "red flags" you quickly learn to differentiate.
Many people are reading the author's interview uncharitably as simply misunderstanding how to answer non-technical question, but I have absolutely been through loops (thankfully rare ones) that did have a "let's press on sensitive issues and see how tough this candidate is" round (one place brought in a consultant who bragged about his experience working with hardened criminals and terrorists to build out a true psych profile on candidates, I declined after learning he had had some "trouble" at a previous high profile job)
Sounds like you've never worked for a truly toxic org, which is great. But, especially if you're interviewing with smaller startups (as the author mentioned), there is a lot more variance and some truly messed up teams (and some truly remarkable ones as well) out there. I've noticed that HN increasingly doesn't have people that work at startups any more, so many people are probably less familiar with what's out there.