I moved out when I was 22, after my stepmother called me "stupid" one time too many and I got angry. You only get your own life to live, you have to live it for yourself. As an adult you cannot allow yourself to be held hostage by another or make it the other person's "fault" you are not taking care of yourself well. It is often very hard to take care of yourself well. But one has to work at it, practice it until you get better/good at it and can then help others take care of themselves; you cannot help take care of others before you can take care of yourself.

When I moved out it was into a shared house; I found someone advertising for a roommate. She turned out to have lots of problem, including drugs, and I moved on from there to my own apartment.