I don't know why you got a Winona reaction but this is true. Lots of actors passed on F4 because of the script. Yeun bolting out of Thunderbolts for the same reason would make perfect sense. His career is soaring and doesn't need this sinking ship. Since eevryone and their mother is in superhero genre whether MCU, DCEU, SCU, The Boys and knock-offs, etc these movies and shows are no more career boosters due to sheer number of actors with identical resumes. You actually stand out if you aren't associated with any of it.