I am really not sure what to do about all of this.
You say “I’m sorry you feel that I’m acting entitled, and I apologize for frequently acting persecuted. I’ll try to behave better in the future.” You mean what you say when you say that, and then you drop it. If necessary, you change the subject.
That’s what you should do.
Don’t say you already apologized because, if necessary, you apologize again. Don’t say “I’m sorry but [some reason or other]” or “I’ll apologize to this person but not that person.” You admit that they’re right—whether they actually are or not—endeavor to improve yourself (because at the end of the day, your own behavior is all you have control over), and move on down the road. If it comes up again, you do it again.
This this this this this.
(Emphasis added to the parts I feel most strongly about.)