Have you ever wondered why people react negatively when you set boundaries? Why they lash out, try to manipulate, or struggle to accept a “No”?
It’s because they benefitted from having a lack of boundaries with you; they felt rejected, it suddenly disrupted a dynamic they know, or they’re trying to get you back down and be defenceless.
They question why you would set boundaries in the first place, explain a million reasons why it is wrong, that you have no place of authority to do so. It was always something that benefited them and their selfish ways.
They lack the emotional regulation and understanding to comprehend why someone else might need to say no.
