I was in a very similar position during 2022. It's a perfect burnout recipe, chronic stressors everywhere and no power to change them. I could feel it building, but was still able to work and the personal stakes were high, so I wanted to make it to the end (which would have been in early 2023). I didn't. I had a break-down in fall, I couldn't do anything anymore (no focus, no energy, really bad memory, lots of mistakes at work). I took sick leave and have been in recovery since, and still don't feel really alright. I have met people who went further than me and have done themselves really bad, and even physical damage doing so - psyche and body feel different, but they are parts of the same organism, and to overtax one is to overtax the other.

In no way was it worth it. I would have chosen differently if I had known what the later stages of burnout felt like.

I really mean it - if it's in any way feasible and you've exhausted other pathways to change inside your role, quit before your body does it for you.