this depends a lot on the parent in question, unfortunately. i'm pleased that you don't have any experience with that fact, and i hope that continues to be true, but it would be worthwhile for you to gain an appreciation of the diversity of other people's life situations
If your parents are shit they will be shit regardless of whether you're also working for them or not. Can't really get away from them unless you emancipate or something.
getting access to an independent income stream is vitally, vitally important in this situation, and getting away from bad parents is actually both considerably less all-or-nothing and more feasible than you are imagining, often