A survivor against a whole ring / operation — not a single attacker. She has to take on the network to get out or bring it down: the surgeon and the handlers and the buyers, an operation with structure. This is the sharpest reading of "kill EVERYONE" (plural = the system).
Test: If she stops killing, does she die?
These are (mostly) modern copyrighted films — we don't stream them, we point you to them.
Where to watch: Tubi rotates these (Raze, Bound to Vengeance, Caged, Even Lambs Have Teeth) — treat as leads, not guarantees.