I think of this in the following context: when someone tries to be everything to everyone, they end up being nothing to nobody. That of course is a double negative, but I believe expresses the intent of what I am looking for very well. That is, you end up being the opposite of everything to everyone. Can anyone think of a opposite that would fit well in that phrase that is gramatically correct?
Learn English – the opposite of being “everything to everyone”
antonymsword-choice
Best Answer
"If you try to be everything to everyone, you end up being nothing to anyone."
About anyone, Macmillan says: