As someone who might quit the software industry myself (after 30+ years) very soon, I can give you a lot of reasons why that might be a reasonable decision ...

As someone who might quit the software industry myself (after 30+ years) very soon, I can give you a lot of reasons why that might be a reasonable decision ... but the interview process, as bad as it often is, isn't one of them. There are still places that haven't succumbed to the mania for interview processes that are supposedly meant to minimize false positives and/or eliminate bias but have really become more of a hazing ritual. You just need to keep trying until you find one. It took me a long time to find my first programming job, when I had neither degree nor (obviously) experience, but I kept at it and eventually got my foot in the door for what turned out to be a pretty good career. It might also help to remind yourself that often the goal of these exercises is not actually to extract a technical answer but to observe how you think through a new problem, ask clarifying questions, handle disagreement, etc. Just stay calm, stay personable, ask questions, be willing to say "I don't know" if that's the case, and remember that another person's hasty judgment is a reflection on them rather than on you.