Sometimes it feels like a story is locked in a certain path. Sometimes it feels like it is the characters who are locked. And, sometimes, it is us as people who feel we cannot change things in our lives.
In all of those cases, it is not true. You can always make a change. Usually we don't change things because they would make things worse (like punching bothersome people in the face). And when every option we think of would end up making your situation worse, that is when you feel stuck.
But no matter what, you always have one more option: leave. If you are in a bad place, walk away. Sure, it's easier said than done, but it is always an option. Pick none of the choices. Go somewhere else. Start fresh. Explore your options. When you feel like you only have one choice and there's nowhere else you can go, just go away.