Have you tried proposing a hybrid path? For example, commit to working full-time + studying part-time (if the school has an evening program), or negotiate a reduced workload during exam season? If your boss is still inflexible, perhaps it's time to consider another environment that values ​​talent development.

I understand the struggle of final exams - the education system sometimes makes us focus on grades instead of actual knowledge. But do you think if you spent an extra day or two studying, you would have less to 'vomit'? It might be less stressful!