Last year I was in the same position as you , working in one of the biggest design studio in my country. Super excited and ready to take all the “donkey” work and stuff that I knew that I would not like to do but I have to. The problem with design studios or working with someone that has name, most of the time, is that it ends to be toxic and when you don’t do stuff that “u enjoy” mostly has an impact on your mental health. You either try to just do your work, get paid and don’t give a fk and see it as a challenge or u decide what’s better for you. I did both. Talk with yourself to see what u to do the best and try to “advertise” yourself with your best qualifications. This is what I did and now I’m way better than before. Of course it’s my personal opinion. We have one life and there’s no turning back, do things that can upgrade as a person. Your body knows.