Oh, good grief.
Half the native speakers of English in the world whom I've heard say JK Rowling's name out loud have mispronounced her surname. Including big-name broadcasters and trans activists. Many people who mispronounce Rowling's name continue to do so even after learning the way she, her family and friends pronounce it and prefer it to be pronounced. But AFAIK, JK Rowling has never once alleged that anyone who gets her name wrong over and over is "being a jerk," or that everyone who bungles her name is denying her the common courtesy and respect that she's entitled to.
I don't consider my first name or last name difficult to pronounce, but both have been said in unusual ways that sound wrong to me by all sorts of people over the course of my entire life. Big deal.
One of my children has a two-syllable first name that at least 80% of the people he/we know mispronounce as one syllable. Big deal.
In the course of my life, I've personally been called by the wrong name in many settings (indluding by teachers and my own parents on occasion as a kid). I've also been "misgendered" more times than I can count too. Many people have been, especially women.
When I was married to a man, I was often called by his last name and referred to as "Mrs His-Last-Name" to my face, in written correspondence and in legal documents even though I never changed my last name to his last or ever used the title "Mrs."
I've received mail my whole adult life that's addressed me as "Sir" as well.
Anyone who is so thin-skinned and quick to feel slighted that they go through life regarding other people's verbal pecadillos and "failings" of this sort as hurtful, disrespectful or abusive digs, slurs and libels that insult and challenge their personal "identity" - or worse, deny their identity or their very existence - is in for a whole lot of needless misery. People who need others to provide constant external recognition, "validation" and "affirmation" of the special identity labels they've adopted are going to drive themselves and everyone around them stark raving mad.
Also, constantly finding fault with, and feeling aggrieved over, the pronouns other people use in reference to you, the way others pronounce your name, and the fact that sometimes other people might call you by the wrong name or forget they ever knew your name at all, is profoundly ableist and ageist. For a wide variety of reasons, many people in the world have (or will one day develop) cognitive disabilities, language processing difficulties, hearing impairments, speech impediments, memory lapses and loss, "brain fog," difficulty paying attention and so on. Many people have a hard time with social niceties and courtesies that come easy to other because of autism. Other people are just natural bunglers or have "tin ears."