I am for euthanasia if a patient has incurable mental or physical sickness and actively suffering, but in this case I think she just had nothing else to do other than embrace her ptsd and live in hell.

Put her in a situation where she is in the wild nature alone and needs to work to survive and the whole thing is solved.

When Im depressed, I go camping. I have to carry water, food , find shelter and make a fire.I got no time for depression or dwelling on the past, else I get wet.