Also, when you finally say “no” to them, they act as though you’re a terrible person.
To them, it looks like they are the only person to which you say no. This means that you say no because of them. People don't like being questioned like that.
Add some assurance that the no is not personal.
The biggest pill was that I am not intelligent. I was just studious and invested enough time to pass exams. People not doing what they should do is not them being stupid but me not grasping the full picture.
The second biggest pill that I am still swallowing is that I am not a good person. I try to behave in a good way, but it's manipulative and not authentic. People don't like goodness if it doesn't come from the heart.