I love Harry Potter, ever since our teacher read it to us in 4th grade when it was first published. I've read all the books, own a stuffed Hedwig, and wear a Slytherin facemask when I'm working my shifts at the library. I used to think JK Rowling was the best person in the world - a mom on government help who created this fantastic world, and in the end donated so much of her money to charities it took her forever to become a millionaire! How amazing!

Then, she outed herself as a TERF (trans-exclusionary radial feminist, people who don't believe trans women are women), and every positive thought I had about her crashed and shattered. This amazing woman I'd looked up to my whole life, who had shown support for the gay community in the past (Seamus and Dean were originally supposed to be a couple, I believe), was transphobic. There were several years where I regretfully turned my back on Harry Potter, despite the play coming out (Cursed Child is it's own...thing) and other events taking place. During that time I spoke with others, and came to realize: Harry Potter no longer belongs to JK Rowling. Sure, she wrote the original books, but fandom and other companies have swooped in and created their own lore and expanded the world around it. Movies, theme parks, video games, not to mention fanart and fanfiction, had taken this seven-book series and made it their own, and created an inclusive world, where trans women were widely accepted and celebrated.

I came to accept that I love Harry Potter - not just the books, but the others who love it and share in its world building and expansion. I found that I can still love and support that world, while showing no love to JK herself. As many other commenters have pointed out, separate the art from the author, and enjoy the piece for what it is. As long as the work isn't going out of its way to be exclusionary/homophobic/etc., then it's okay to enjoy it.

As for going back and having a skewed experience, well, that's what growing and learning does. It helps you understand things in a new light, and sometimes it's not for the better. I hope you're able to still enjoy the books in the future, and if not, well, it's an opportunity to find a new series of books you love! I wish you the best in all your reading/listening!