Teacher evaluations are hard to open and read because they are unanswerable. I can't say, "But--" or "If--"; it's over. There's no correcting, even of the praise ("What you liked a lot wasn't the main thing I was trying to teach you!"). Evaluations go into a semi-permanent file. A student evaluation somewhere says about me, "She wears cheap jewelry."
Even worse, some writer's creative nonfiction features a certain character: Let's say it's you. But unlike a student evaluator, the creative nonfiction writer doesn't judge you by even a vague set of standards; his or her view is totally subjective and piecemeal.
The writer "characterizes" you, describing a few of your traits, and, oh God, quotes selected things they claim you SAID. Even if it's a flattering characterization, your gut reaction will be to cringe or criticize. Student wrote about me in a free-write: "Catherine is very organized." What could be wrong with that, you say? Well, she didn't add that I am also very beautiful! I don't believe that anyone who has ever been quoted in print thinks he or she has been quoted correctly. But there you are on paper, exposed to the eyes of strangers, and a mere pawn in the writer's world.
So, yes, real people will feel annoyed and upset when they read what you wrote about them--even if what you wrote was nice. What you wrote won't ever match what they'd write about themselves, if they could; but they can't. Your job as a nonfiction writer: Honesty. And maybe for the sake of peace not presenting your "characters" with a gift-wrapped copy of what you wrote. If they find it themselves they can always say that you didn't know any better.