Trigger warning - childhood emotional abuse and my reaction to it.

1. What challenges and feelings have you faced when trying to set healthy boundaries, and when your boundaries have been breached?

As a child, I felt desperation and despair when my requests for mercy were ignored and trodden over. It led to being suicidal as I saw no way out, and three suicide attempts.
As an adult, I also felt some desperation but was able to plan out a response (to set a boundary) and how to phrase that response, so it was OK. Also, as an adult I have the option of walking away from that person for my wellbeing, if necessary, if my boundaries aren't respected. 

2. What was the impact and how did you handle them (or could you handle them)?

I think as a child the impact was catastrophic and left me with lifelong damage and mental illness. Also a fierce desire for independence. 

As an adult, the ability to walk away from that person ( = an escape from the bad treatment) means that the feelings are easier to control.