You’re allowed to hate the process and still finish it.

Enjoying something was never a requirement for doing it. Plenty of people quit not because the work defeated them, but because they decided their dislike of it was a message telling them to stop. Resentment and commitment can sit side by side for months, and the finishing still counts even if you hated most of it.

If you are in the middle of something grim, stop checking whether you like it. Pick the next unavoidable step and do that, then the one after. Save the question of whether to carry on for a day when you are rested, because it is unanswerable while you are this tired.