I don't think there's any shame in rage-quitting a FAANG company. I was once in a high-profile, ambitious open-source (but not FLOSS) project which had much th

I don't think there's any shame in rage-quitting a FAANG company. I was once in a high-profile, ambitious open-source (but not FLOSS) project which had much the same NIH syndrome as you're experiencing, but didn't have the staff/budget to maintain their tooling properly and I hated it to the point where I got myself fired, because I didn't have the integrity to quit on my own. If you can change something, try. If you notice that it's futile, quit. I can tell you from experience that trying to suffer through something while having no agency is really really really bad for your mental health.