Can you not exercise what you’ve vested and move on to a more reasonable org?
My employee number is under 25, but it's still just pretend equity at this point.
A. What is the value of your equity?
B. What is the likelihood of it vesting in the next 5 years?
C. How much "total benefit" (salary increase, stress decrease, etc) would you gain from moving to a different company over the next 5 years?
If A*B < C, move.
Heck, even 5 years might be too long of a consideration here.